the species is strongly tied to conifer trees. For folks living within its range, this thick-billed species may visit ...

Learn how to identify a Cassin’s finch. Their nest is a cup made of natural materials, string and feathers on tree branches or manmade structures; the nest holds four to five spotted bluish ...

the ground finch has a short beak adapted for eating seeds buried under the soil, and the tree finch has a parrot-shaped beak suited for stripping bark to find insects. The Grants have focused ...

and 7 species of tree-dwelling insect-eaters. Scientists long after Darwin spent years trying to understand the process that had created so many types of finches that differed mainly in the size ...