House Finch ・Purple Finch ・Cassin's ... In winter they disperse from California to Florida. Even though they are desert birds they are usually found near stream sides. Typical manmade habitats ...

the average beak depth increased in size and the finch population had more finches with greater beak depths in 1978 than before the drought. Why do you think the average beak depth of the birds ...

The attractive house finch is one of the more common and recognizable species throughout the United States. Originally a “western” species of semiarid environments, it was introduced in the ...

The Grants found that the offspring of the birds that survived the 1977 drought tended to be larger, with bigger beaks. So the adaptation to a changed environment led to a larger-beaked finch ...

Spring migrations runs between March 1 and June 15. Fall migration runs between August 1 and November 30. Peak spring migration is in April. Birds are on the move as their annual spring migration ...