Well, why shouldn't they? Eggs and nestlings are a good source of protein, they're defenseless (although often fiercely defended by their parents), and squirrels have no trouble getting to nests in trees and similar places. Don't forget, humans e... read more
Don't forget, humans eat bird eggs and various young animals (like veal and lamb), too. read more
Gray squirrels (Sciurus carolinensis) and eastern chipmunks (Tamias striatus) are known nest raiders that will eat eggs or chicks. They also occasionally kill and eat adult birds. And gray squirrels are commonly seen eating road kills. read more