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| Carolina Chickadee |
I then opened the small door to see the inside of the house and I was truly surprised to find how well organized these birds were while they lived there.
Saturday, April 16, 2011
Well organized birds!
Last year I had a family of Carolina Chickadees nesting in one of my birds houses, apparently the couple had paired and lay eggs to have family, after a while the eggs had hatched and they had some chicks, in time they grew strong enough to fly, then the whole family of Carolina Chickadees flew away at the end of the season.
I then opened the small door to see the inside of the house and I was truly surprised to find how well organized these birds were while they lived there.
I’ve made a small diagram to explain to you what I found. In the bottom compartment was an elaborated nest made of twigs and what appear to be peat moss. In the compartment above the nest was used as a WC (Bathroom). In the anteroom connected to the abode was a bunch of different seeds, it was obvious that it was the place were they ate. I couldn’t believe how well the Chickadees organized their home. Just like humans would do. I think that it is very remarkable and gave me great satisfaction to have found these facts by my own observations.
I then opened the small door to see the inside of the house and I was truly surprised to find how well organized these birds were while they lived there.
Friday, April 15, 2011
Dark-eyed Junco
Dark-eyed Junco - Spec. Name: Junco Hyemalis
This is the best-known species of the juncos, a genus of small grayish American sparrows. This bird is common across much of temperate North America and in summer ranges far into the Arctic. It is a very variable species, much like the related Fox Sparrow (Passerella iliaca), and its systematics is still not completely untangled.
Adults generally have gray heads, necks, and breasts, gray or brown backs and wings, and a white belly, but show a confusing amount of variation in plumage details. The white outer tail feathers flash distinctively in flight and while hopping on the ground. The bill is usually pale pinkish.
Males tend to have darker, more conspicuous markings than the females. Also they are 5–6.5 in (13–17 cm). Juveniles often have pale streaks and may even be mistaken for Vesper Sparrows (Pooecetes gramineus) until they acquire adult plumage at 2 to 3 months. But junco fledglings' heads are generally quite uniform in color already, and initially their bills still have conspicuous yellowish edges to the gape, remains of the fleshy wattles that guide the parents when they feed the nestlings.
The song is a trill similar to the Chipping Sparrow's (Spizella passerina), except that the Red-backed Junco's song is more complex, similar to that of the Yellow-eyed Junco(Junco phaeonotus). Calls include tick sounds and very high-pitched tinkling chips.
The Dark-eyed Junco was first described by Linnaeus in his 1758 Systema naturae as Fringilla hyemalis. The description consisted merely of the laconic remark "F[ringilla] nigra, ventre albo. ("A black 'finch' with white belly"), a reference to a source, and a statement that it came from "America".
Linnaeus' source was Mark Catesby who described the Slate-colored Junco before binomial nomenclature as his "snow-bird", moineau de neige or passer nivalis ("snow sparrow") thus:
"The Bill of this Bird is white: The Breast and Belly white. All the rest of the Body black; but in some places dusky, inclining to Lead-color. In Virginia and Carolina they appear only in Winter : and in Snow they appear most. In Summer none are seen. Whether they retire and breed in the North (which is most probable) or where they go, when they leave these Countries in Spring, is to me unknown."
Still, at least the Slate-colored Junco is unmistakable enough to make it readily recognizable even from Linnaeus' minimal description. Its modern scientific name means "winter junco", from Latin hyemalis "of the winter".
Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. See Terms of Use for details
Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
This is the best-known species of the juncos, a genus of small grayish American sparrows. This bird is common across much of temperate North America and in summer ranges far into the Arctic. It is a very variable species, much like the related Fox Sparrow (Passerella iliaca), and its systematics is still not completely untangled.
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| Dark-eyed Junco |
Males tend to have darker, more conspicuous markings than the females. Also they are 5–6.5 in (13–17 cm). Juveniles often have pale streaks and may even be mistaken for Vesper Sparrows (Pooecetes gramineus) until they acquire adult plumage at 2 to 3 months. But junco fledglings' heads are generally quite uniform in color already, and initially their bills still have conspicuous yellowish edges to the gape, remains of the fleshy wattles that guide the parents when they feed the nestlings.
The song is a trill similar to the Chipping Sparrow's (Spizella passerina), except that the Red-backed Junco's song is more complex, similar to that of the Yellow-eyed Junco(Junco phaeonotus). Calls include tick sounds and very high-pitched tinkling chips.
The Dark-eyed Junco was first described by Linnaeus in his 1758 Systema naturae as Fringilla hyemalis. The description consisted merely of the laconic remark "F[ringilla] nigra, ventre albo. ("A black 'finch' with white belly"), a reference to a source, and a statement that it came from "America".
Linnaeus' source was Mark Catesby who described the Slate-colored Junco before binomial nomenclature as his "snow-bird", moineau de neige or passer nivalis ("snow sparrow") thus:
"The Bill of this Bird is white: The Breast and Belly white. All the rest of the Body black; but in some places dusky, inclining to Lead-color. In Virginia and Carolina they appear only in Winter : and in Snow they appear most. In Summer none are seen. Whether they retire and breed in the North (which is most probable) or where they go, when they leave these Countries in Spring, is to me unknown."
Still, at least the Slate-colored Junco is unmistakable enough to make it readily recognizable even from Linnaeus' minimal description. Its modern scientific name means "winter junco", from Latin hyemalis "of the winter".
Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. See Terms of Use for details
Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
Thursday, April 14, 2011
Carolina Chickadee
Carolina Chickadee- Spec. Name: Poecile Carolinensis
This is a small passerine bird in the tit family Paridae. Often, it is still placed in the genus Parus with most other tits, but mtDNA cytochrome b sequence data and morphology suggest that separating Poecile more adequately expresses these birds' relationships (Gill et al., 2005). The American Ornithologists' Union has been treating Poecile as distinct genus for some time already.
Adults are 11.5–13 cm long with a weight of 9–12 g, and have a black cap and bib with white sides to the face. Their underparts are white with rusty brown on the flanks; their back is grey. They have a short dark bill, short wings and a moderately long tail. Very similar to the Black-capped Chickadee, the Carolina Chickadee is best told from it by the slightly browner wing with the greater coverts brown (not whitish fringed) and the white fringing on the secondary feathers slightly less conspicuous; the tail is also slightly shorter and more square-ended. The calls and song also differ subtly to an experienced ear: the Carolina Chickadee's chick-a-dee call is faster and higher pitched than that of the Black-Capped Chickadee, and the Carolina chickadee has a four note fee-bee-fee-bay song, whereas the Black-capped omits the high notes. Identification is very difficult even with an excellent view.
The most famous call is the familiar chick-a-dee-dee-dee which gave this bird its name and its song is fee-bee-fee-bay.
Their breeding habitat is mixed or deciduous woods in the United States from New Jersey west to southern Kansas and south to Florida and Texas; there is a gap in the range at high altitudes in the Appalachian Mountains where they are replaced by their otherwise more northern relative, the Black-capped Chickadee. They nest in a hole in a tree; the pair excavates the nest, using a natural cavity or sometimes an old woodpecker nest. They may interbreed with Black-capped Chickadees where the ranges overlap, which can make identification difficult.
They are permanent residents, not usually moving south even in severe winter weather.
These birds hop along tree branches searching for food, sometimes hanging upside down or hovering; they may make short flights to catch insects in the air. Insects form a large part of their diet, especially in summer; seeds and berries become important in winter. They sometimes hammer seeds on a tree or shrub to open them; they also will store seeds for later use.
During the fall migration and winter, chickadees often flock together. Many other species of birds, including titmice, nuthatches, and warblers can often be found foraging in these flocks. Mixed flocks stay together because the chickadees call out whenever they find a good source of food. This calling out forms cohesion for the group, allowing the other birds to find food more efficiently.
Carolina chickadees are able to lower their body temperatures to induce an intentional state of hypothermia called torpor. They do this to conserve energy during extremely cold winters. In extremely cold weather conditions they look for cavities where they can hide in and spend up to fifteen hours at a time in torpor; during this time they are awake but unresponsive; they should not be picked up and handled at this time, as the stress of being held may cause their death.
Carolina chickadees are so similar to black-capped chickadees that they themselves have trouble telling their species apart. Because of this they sometimes mate producing hybrids. The most obvious difference between the three chickadees is that the Carolina chickadee sings four-note song, black-capped ones sing two-note songs, and the hybrids sing three-note songs.
All photographs shown in this blog were shot by HJ Ruiz.
Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. See Terms of Use for details.
Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
This is a small passerine bird in the tit family Paridae. Often, it is still placed in the genus Parus with most other tits, but mtDNA cytochrome b sequence data and morphology suggest that separating Poecile more adequately expresses these birds' relationships (Gill et al., 2005). The American Ornithologists' Union has been treating Poecile as distinct genus for some time already.
 |
| Carolina Chickadee |
Adults are 11.5–13 cm long with a weight of 9–12 g, and have a black cap and bib with white sides to the face. Their underparts are white with rusty brown on the flanks; their back is grey. They have a short dark bill, short wings and a moderately long tail. Very similar to the Black-capped Chickadee, the Carolina Chickadee is best told from it by the slightly browner wing with the greater coverts brown (not whitish fringed) and the white fringing on the secondary feathers slightly less conspicuous; the tail is also slightly shorter and more square-ended. The calls and song also differ subtly to an experienced ear: the Carolina Chickadee's chick-a-dee call is faster and higher pitched than that of the Black-Capped Chickadee, and the Carolina chickadee has a four note fee-bee-fee-bay song, whereas the Black-capped omits the high notes. Identification is very difficult even with an excellent view.
Their breeding habitat is mixed or deciduous woods in the United States from New Jersey west to southern Kansas and south to Florida and Texas; there is a gap in the range at high altitudes in the Appalachian Mountains where they are replaced by their otherwise more northern relative, the Black-capped Chickadee. They nest in a hole in a tree; the pair excavates the nest, using a natural cavity or sometimes an old woodpecker nest. They may interbreed with Black-capped Chickadees where the ranges overlap, which can make identification difficult.
They are permanent residents, not usually moving south even in severe winter weather.
These birds hop along tree branches searching for food, sometimes hanging upside down or hovering; they may make short flights to catch insects in the air. Insects form a large part of their diet, especially in summer; seeds and berries become important in winter. They sometimes hammer seeds on a tree or shrub to open them; they also will store seeds for later use.
During the fall migration and winter, chickadees often flock together. Many other species of birds, including titmice, nuthatches, and warblers can often be found foraging in these flocks. Mixed flocks stay together because the chickadees call out whenever they find a good source of food. This calling out forms cohesion for the group, allowing the other birds to find food more efficiently.
Carolina chickadees are able to lower their body temperatures to induce an intentional state of hypothermia called torpor. They do this to conserve energy during extremely cold winters. In extremely cold weather conditions they look for cavities where they can hide in and spend up to fifteen hours at a time in torpor; during this time they are awake but unresponsive; they should not be picked up and handled at this time, as the stress of being held may cause their death.
Carolina chickadees are so similar to black-capped chickadees that they themselves have trouble telling their species apart. Because of this they sometimes mate producing hybrids. The most obvious difference between the three chickadees is that the Carolina chickadee sings four-note song, black-capped ones sing two-note songs, and the hybrids sing three-note songs.
All photographs shown in this blog were shot by HJ Ruiz.
Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. See Terms of Use for details.
Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
Wednesday, April 13, 2011
European Starling
European Starling - Spec. Name: Sturnus Vulgaris This is a passerine bird in the family Sturnidae.
The European Starling, native to Eurasia, has the dubious distinction of being one of the most successful birds introduced to North America. This, and several other misguided bird introductions, were an effort to introduce into North America all of the birds mentioned in the writings of William Shakespeare.  The starling is an intelligent, attractive, and interesting bird, but it has a significant negative impact on native species, and its habit of forming large wintering flocks often make it an unwelcome pest. |
The European Starling has a glossy black plumage with greenish and purple iridescence. White tips predominate on the contour feathers following their annual molt. These white tips gradually wear off by the following spring, giving the bird an overall glossy black look. Starlings are 7.5 to 8.7 inches long with a wingspan of 15.5 inches. Weights range from 2.5 to 3 ounces.  All photographs shown here were shot in Georgia by HJ Ruiz |
Tuesday, April 12, 2011
Peruvian Pelican
Peruvian Pelican - Spec. Name: Pelecanus Thagus
This is a member of the pelican family. It lives on the west coast of South America, from Lobos de Tierra Island in Peru to Pupuya Islet in Chile.
These birds are dark in colour with a white stripe from the top of the bill up to the crown and down the sides of the neck. They have long tufted feathers on the top of their heads. It used to be considered a subspecies of the Brown Pelican (Pelecanus occidentalis). The Peruvian birds are nearly twice the bulk of the Brown Pelican, averaging 15.4 lb (7 kg) in weight; they are also longer, measuring about 5 ft (1.5 m) overall.
The main breeding season occurs from September to March. Clutch size is usually two or three eggs. Eggs are incubated for approximately 4 to 5 weeks, with the rearing period lasting about 3 months.
This bird feeds on several species of fish. It feeds by diving into the water from flight, like the Brown Pelican.
Its status was first evaluated for the IUCN Red List in 2008, being listed as "Near threatened".
The photographs were taken at the port of Ancon in Peru by HJ Ruiz.
These birds are dark in colour with a white stripe from the top of the bill up to the crown and down the sides of the neck. They have long tufted feathers on the top of their heads. It used to be considered a subspecies of the Brown Pelican (Pelecanus occidentalis). The Peruvian birds are nearly twice the bulk of the Brown Pelican, averaging 15.4 lb (7 kg) in weight; they are also longer, measuring about 5 ft (1.5 m) overall.
The main breeding season occurs from September to March. Clutch size is usually two or three eggs. Eggs are incubated for approximately 4 to 5 weeks, with the rearing period lasting about 3 months.
This bird feeds on several species of fish. It feeds by diving into the water from flight, like the Brown Pelican.
Its status was first evaluated for the IUCN Red List in 2008, being listed as "Near threatened".
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| Peruvian Pelicans |
Monday, April 11, 2011
Brown-headed Cowbird
Brown-headed Cowbird - Spec. Name: Molothrus ater
This is a small brood parasitic * icterid of temperate to subtropical North America. They are permanent residents in the southern parts of their range; northern birds migrate to the southern United States and Mexico in winter, returning to their summer habitat about March/April.
They resemble New World orioles in general shape but have a finch-like head and beak. Adults have a short finch-like bill and dark eyes. The adult male is mainly iridescent black with a brown head. The adult female is grey with a pale throat and fine streaking on the underparts.
They occur in open or semi-open country and often travel in flocks, sometimes mixed with Red-winged Blackbirds (particularly in spring) and Bobolinks (particularly in fall), as well as Common Grackle or European Starlings. These birds forage on the ground, often following grazing animals such as horses and cows to catch insects stirred up by the larger animals. They mainly eat seeds and insects.
Before European settlement, the Brown-headed Cowbird followed bison herds across the prairies. Their parasitic nesting behaviour complemented this nomadic lifestyle. Their numbers expanded with the clearing of forested areas and the introduction of new grazing animals by settlers across North America. Brown-headed Cowbirds are now commonly seen at suburban birdfeeders.
* Explaining Brood Parasitism
Brood parasites are organisms that use the strategy of brood parasitism, a kind of kleptoparasitism found amongbirds, fish or insects, involving the manipulation and use of host individuals either of the same (intraspecific brood-parasitism) or different species (interspecific brood-parasitism) to raise the young of the brood-parasite. This relieves the parasitic parent from the investment of rearing young or building nests, enabling them to spend more time foraging, producing offspring etc. Additionally, the risk of egg loss to raiders such as raccoons is mitigated, by having distributed the eggs amongst a number of different nests.
As this behaviour is damaging to the host, it will often result in anevolutionary arms race between parasite and host.
In many monogamous bird species, there are extra-pair matings resulting in males outside the pair bond siring offspring and used by males to escape from the parental investment in raising their offspring.
This form of cuckoldry is taken a step further when females lay their eggs in the nests of other individuals. Intraspecific brood parasitism is seen in a number of duck species with females laying their eggs in the nests of others for example in the Goldeneye, Bucephala clangula.Interspecific brood-parasites include the Old World cuckoos in Eurasia and Australia, cowbirds and Black-headed Ducks in the Americas, and indigobirds, whydahs, and the honeyguides in Africa. Seven independent origins of obligate interspecific brood parasitism in birds have been proposed. While there is still some controversy over when and how many origins of interspecific brood parasitism have occurred, recent phylogenetic analyses suggest two origins in Passeriformes (once in New World cowbirds: Icteridae, and once in African Finches: Viduidae); three origins in Old World and New World cuckoos (once in Cuculinae, Phaenicophaeinae, and in Neomorphinae-Crotophaginae); a single origin in Old World honeyguides (Indicatoridae); and in a single species of waterfowl, the black-headed duck (Heteronetta atricapilla).
Most avian brood parasites are specialists which will only parasitize a single host species or a small group of closely related host species, but four out of the five parasitic cowbirds are generalists, which parasitize a wide variety of hosts; the Brown-headed Cowbird has 221 known hosts. They usually only lay one egg per nest, although in some cases, particularly the cowbirds, several females may use the same host nest.The Common Cuckoo presents an interesting case in which the species as a whole parasitizes a wide variety of hosts, but individual females specialize in a single species. Genes regulating egg coloration appear to be passed down exclusively along the maternal line, allowing females to lay mimetic eggs in the nest of the species they specialize in. Females are thought to imprint upon the host species which raised them, and subsequently only parasitize nests of that species. Male Common Cuckoos will fertilize females of all lines, maintaining sufficient gene flow among the different maternal lines.
The mechanisms of host selection by female cuckoos are somewhat unclear, though several hypotheses have been suggested in attempt to explain the choice. These include genetic inheritance of host preference, host imprinting on young birds, returning to place of birth and subsequently choosing a host randomly (“natal philopatry”), choice based on preferred nest site (nest-site hypothesis), and choice based on preferred habitat (habitat-selection hypothesis). Of these hypotheses the nest-site selection and habitat selection have been most supported by experimental analysis.
Common adaptations of avian brood parasitesAmong specialist avian brood parasites, mimetic eggs are a nearly universal adaptation. There is even some evidence that the generalist Brown-headed Cowbird may have evolved an egg coloration mimicking a number of their hosts.
Most avian brood parasites will remove a host egg when they lay one of their own in a nest. Depending upon the species, this can happen either in the same visit to the host nest or in a separate visit before or after the parasitism. This both prevents the host species from realizing their nest has been parasitized and reducescompetition for the parasitic nestling once it hatches.Most avian brood parasites have very short egg incubation periods and rapid nestling growth. This gives the parasitic nestling a head start on growth over its nestmates, allowing it to outcompete them. In cases where the host nestlings are significantly smaller than the parasite nestling, the host nestlings will often starve to death. Some brood parasites will eliminate all their nestmates shortly after hatching, either by ejecting them from the nest or killing them with sharp mandiblehooks which fall off after a few days.
Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. See Terms of Use for details.Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
This is a small brood parasitic * icterid of temperate to subtropical North America. They are permanent residents in the southern parts of their range; northern birds migrate to the southern United States and Mexico in winter, returning to their summer habitat about March/April.
 |
| Brown-headed Cowbird (M) |
They occur in open or semi-open country and often travel in flocks, sometimes mixed with Red-winged Blackbirds (particularly in spring) and Bobolinks (particularly in fall), as well as Common Grackle or European Starlings. These birds forage on the ground, often following grazing animals such as horses and cows to catch insects stirred up by the larger animals. They mainly eat seeds and insects.
 |
| Females |
Before European settlement, the Brown-headed Cowbird followed bison herds across the prairies. Their parasitic nesting behaviour complemented this nomadic lifestyle. Their numbers expanded with the clearing of forested areas and the introduction of new grazing animals by settlers across North America. Brown-headed Cowbirds are now commonly seen at suburban birdfeeders.
 |
| Brrown-headed Cowbird (M) |
* Explaining Brood Parasitism
Brood parasites are organisms that use the strategy of brood parasitism, a kind of kleptoparasitism found amongbirds, fish or insects, involving the manipulation and use of host individuals either of the same (intraspecific brood-parasitism) or different species (interspecific brood-parasitism) to raise the young of the brood-parasite. This relieves the parasitic parent from the investment of rearing young or building nests, enabling them to spend more time foraging, producing offspring etc. Additionally, the risk of egg loss to raiders such as raccoons is mitigated, by having distributed the eggs amongst a number of different nests.
As this behaviour is damaging to the host, it will often result in anevolutionary arms race between parasite and host.
In many monogamous bird species, there are extra-pair matings resulting in males outside the pair bond siring offspring and used by males to escape from the parental investment in raising their offspring.
This form of cuckoldry is taken a step further when females lay their eggs in the nests of other individuals. Intraspecific brood parasitism is seen in a number of duck species with females laying their eggs in the nests of others for example in the Goldeneye, Bucephala clangula.Interspecific brood-parasites include the Old World cuckoos in Eurasia and Australia, cowbirds and Black-headed Ducks in the Americas, and indigobirds, whydahs, and the honeyguides in Africa. Seven independent origins of obligate interspecific brood parasitism in birds have been proposed. While there is still some controversy over when and how many origins of interspecific brood parasitism have occurred, recent phylogenetic analyses suggest two origins in Passeriformes (once in New World cowbirds: Icteridae, and once in African Finches: Viduidae); three origins in Old World and New World cuckoos (once in Cuculinae, Phaenicophaeinae, and in Neomorphinae-Crotophaginae); a single origin in Old World honeyguides (Indicatoridae); and in a single species of waterfowl, the black-headed duck (Heteronetta atricapilla).
 |
| Eastern Towhee mouth feeding a female cowbird |
Most avian brood parasites are specialists which will only parasitize a single host species or a small group of closely related host species, but four out of the five parasitic cowbirds are generalists, which parasitize a wide variety of hosts; the Brown-headed Cowbird has 221 known hosts. They usually only lay one egg per nest, although in some cases, particularly the cowbirds, several females may use the same host nest.The Common Cuckoo presents an interesting case in which the species as a whole parasitizes a wide variety of hosts, but individual females specialize in a single species. Genes regulating egg coloration appear to be passed down exclusively along the maternal line, allowing females to lay mimetic eggs in the nest of the species they specialize in. Females are thought to imprint upon the host species which raised them, and subsequently only parasitize nests of that species. Male Common Cuckoos will fertilize females of all lines, maintaining sufficient gene flow among the different maternal lines.
The mechanisms of host selection by female cuckoos are somewhat unclear, though several hypotheses have been suggested in attempt to explain the choice. These include genetic inheritance of host preference, host imprinting on young birds, returning to place of birth and subsequently choosing a host randomly (“natal philopatry”), choice based on preferred nest site (nest-site hypothesis), and choice based on preferred habitat (habitat-selection hypothesis). Of these hypotheses the nest-site selection and habitat selection have been most supported by experimental analysis.
Common adaptations of avian brood parasitesAmong specialist avian brood parasites, mimetic eggs are a nearly universal adaptation. There is even some evidence that the generalist Brown-headed Cowbird may have evolved an egg coloration mimicking a number of their hosts.
Most avian brood parasites will remove a host egg when they lay one of their own in a nest. Depending upon the species, this can happen either in the same visit to the host nest or in a separate visit before or after the parasitism. This both prevents the host species from realizing their nest has been parasitized and reducescompetition for the parasitic nestling once it hatches.Most avian brood parasites have very short egg incubation periods and rapid nestling growth. This gives the parasitic nestling a head start on growth over its nestmates, allowing it to outcompete them. In cases where the host nestlings are significantly smaller than the parasite nestling, the host nestlings will often starve to death. Some brood parasites will eliminate all their nestmates shortly after hatching, either by ejecting them from the nest or killing them with sharp mandiblehooks which fall off after a few days.
Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. See Terms of Use for details.Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
Sunday, April 10, 2011
Song Sparrow
Song Sparrow - Melospiza Melodia
This is a medium-sized American sparrow. Adults have brown upper-parts with dark streaks on the back and are white underneath with dark streaking and a dark brown spot in the middle of the breast. They have a brown cap and a long brown rounded tail. Their face is grey with a streak through the eye.
In the field, they are most easily confused with its congener the Lincoln's Sparrow, and the Savannah Sparrow. The former can be recognized by its shorter, greyer tail and the differently-patterned head, the brown cheeks forming a clear-cut angular patch. The Savannah Sparrow has a forked tail and yellowish flecks on the face when seen up close.
Although they are a habitat generalist, their favorite habitat is brushy areas and marshes, including salt marshes, across most of Canada and the United States. They also thrive in human areas, such as in suburbs, along edges in agricultural areas, and along roadsides. In southern locations, they are permanent residents. Northern birds migrate to the southern United States or Mexico, where there is also a local population resident all year round. The Song Sparrow is a very rare vagrant to western Europe, with a few recorded in Great Britain and Norway.
These birds forage on the ground, in shrubs or in very shallow water. They mainly eat insects and seeds. Birds in salt marshes may also eat small crustaceans. They nest either in a sheltered location on the ground or in trees or shrubs.
The Song Sparrow lays 3-5 eggs. The egg coloring is a brown spotted greenish-white.
The male of this species uses its melodious and fairly complex song to declare ownership of its territory and to attract females.
The Song Sparrow's song consists of a combination of repeated notes, quickly passing isolated notes, and trills. The songs are very crisp, clear, and precise, making them easily distinguishable by human ears. A particular song is determined not only by pitch and rhythm but also by the timbre of the trills. Although one bird will know many songs - as many as 20 different tunes with as many as 1,000 improvised variations on the basic theme, unlike thrushes, the Song Sparrow usually repeats the same song many times before switching to a different song.
Song Sparrows typically learn their songs from a handful of other birds that have neighboring territories. They are most likely to learn songs that are shared in common between these neighbors. Ultimately, they will choose a territory close to or replacing the birds that they have learned from. This allows the Song Sparrows to address their neighbors with songs shared in common with those neighbors. It has been demonstrated that Song Sparrows are able to distinguish neighbors from strangers on the basis of song, and also that females are able to distinguish (and prefer) their mate's songs from those of other neighboring birds, and they prefer songs of neighboring birds to those of strangers.
Other birds such as mockingbirds are not able to effectively imitate the Song Sparrow's song.
This is a medium-sized American sparrow. Adults have brown upper-parts with dark streaks on the back and are white underneath with dark streaking and a dark brown spot in the middle of the breast. They have a brown cap and a long brown rounded tail. Their face is grey with a streak through the eye.
 |
| Song Sparrow |
Although they are a habitat generalist, their favorite habitat is brushy areas and marshes, including salt marshes, across most of Canada and the United States. They also thrive in human areas, such as in suburbs, along edges in agricultural areas, and along roadsides. In southern locations, they are permanent residents. Northern birds migrate to the southern United States or Mexico, where there is also a local population resident all year round. The Song Sparrow is a very rare vagrant to western Europe, with a few recorded in Great Britain and Norway.
These birds forage on the ground, in shrubs or in very shallow water. They mainly eat insects and seeds. Birds in salt marshes may also eat small crustaceans. They nest either in a sheltered location on the ground or in trees or shrubs.
The Song Sparrow lays 3-5 eggs. The egg coloring is a brown spotted greenish-white.
The Song Sparrow's song consists of a combination of repeated notes, quickly passing isolated notes, and trills. The songs are very crisp, clear, and precise, making them easily distinguishable by human ears. A particular song is determined not only by pitch and rhythm but also by the timbre of the trills. Although one bird will know many songs - as many as 20 different tunes with as many as 1,000 improvised variations on the basic theme, unlike thrushes, the Song Sparrow usually repeats the same song many times before switching to a different song.
Song Sparrows typically learn their songs from a handful of other birds that have neighboring territories. They are most likely to learn songs that are shared in common between these neighbors. Ultimately, they will choose a territory close to or replacing the birds that they have learned from. This allows the Song Sparrows to address their neighbors with songs shared in common with those neighbors. It has been demonstrated that Song Sparrows are able to distinguish neighbors from strangers on the basis of song, and also that females are able to distinguish (and prefer) their mate's songs from those of other neighboring birds, and they prefer songs of neighboring birds to those of strangers.
Other birds such as mockingbirds are not able to effectively imitate the Song Sparrow's song.
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