Even fewer would have the patience to catch, weigh, measure, and identify hundreds of small birds and record their diets of seeds. But for the Grants, the rewards have been great: They have done ...

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 ...

I was fortunate enough to have a pair of purple finches nest near me, allowing me to observe their courtship ritual for the first time. The male sang incessantly from a tree ...