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Gestation refers to live birth and the time between fertilization and birth, however in birds and most repitiles incubation time refers to the time between fertilization and hatching. In the American Goldfinch the incubation time is aproximately 11 days. Aproximately in this case means that the incubation time rarely varies by more than a day plus or minus.
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Why is Iowa's state bird the Eastern Goldfinch?
American Goldfinch, not eastern. I don't know why. According to the encyclopedia the American and Eastern Goldfinch are the same species.
Is a Willow Goldfinch a American Goldfinch?
Yes. The Willow Goldfinch is a subspecies found west of the Rocky Mountains in the US.
What is a yellowbird?
A yellowbird is an alternative name for the yellow warbler, or the American goldfinch.
What is the climate for the American Goldfinch?
According to an internet search, the American Goldfinch's migration patterns favor regions where the minimum January temperature does not go below an average of 0 degrees Fahrenheit.
What is California yellow breasted bird with black and white wings?
Probably a male American Goldfinch in breeding plumage. But I think this description could fit the males of the Evening Grosbeak, Lesser Goldfinch, Scott's Oriole, Townsend's Warbler, or even some flycatchers, depending on lighting. American Goldfinch are just the most common and widespread.
