“This bird (above) looks like a house finch, but the coloring is not typical. What kind of bird is this?” asks Birds & Blooms reader Jean Bullock of Du Quoin, Illinois. Birding experts Kenn ...

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 ...