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The American goldfinch displays sexual dimorphism in its coloration; the male is a vibrant yellow in the summer and an olive color during the winter months, while the female is a dull yellow-brown shade which brightens only slightly during the summer. The male displays brightly colored plumage during the
The American goldfinch (Spinus tristis) is a small North American bird in the finch family. It is migratory , ranging from mid- Alberta to North Carolina during the breeding season , and from just south of the Canada–United States border to Mexico during the winter.
American goldfinch (Spinus tristis) male (left) and female (right) in Johnston County, North Carolina, USA. The finches have a near-global distribution, being found across the Americas, Eurasia and Africa, as well as some island groups such as the Hawaiian islands.
Adult male Eurasian siskins are bright green and yellow with a black cap, and an unstreaked throat and breast; the pine siskin does not have a corresponding bright plumage. Adult female Eurasian siskins also usually have green and yellow plumage tones: for example, yellow in the supercilium and on the sides of the breast, green tones in the ...
All have twelve tail feathers and nine primaries. These birds have a bouncing flight with alternating bouts of flapping and gliding on closed wings, and most sing well. Twelve species have been recorded in Michigan. American goldfinch, Spinus tristis; Brambling, Fringilla montifringilla (A) Cassin's finch, Haemorhous cassinii (A)
The lesser goldfinch was formally described by the American zoologist Thomas Say in 1822 under the binomial name Fringilla psaltria. [4] The specific epithet psaltria is Ancient Greek for a female harpist. [5] The type locality is Colorado Springs, Colorado. [6]
American goldfinch: Spinus tristis: mid-Alberta to North Carolina during the breeding season, and from just south of the Canada–United States border to Mexico during the winter Lawrence's goldfinch: Spinus lawrencei: California and Baja California, winters in the southwestern United States and northern Mexico Lesser goldfinch: Spinus psaltria
Furthermore, male and female plumage is indistinguishable in ultraviolet and visible light. A study published in 1999 showed that male long-tailed finches were unable to determine the sex of unfamiliar members of their species unless the latter bird declared its sex by song. [11] Juveniles have black beaks and shorter tail feathers. [9]