 Songbirds are represented by various species of blackbirds, chickadees, finches, jays, sparrows, swallows, thrushes, vireos, warblers, and wrens.One of the more unique songbirds is the red crossbill, a finch that uses its crossed mandibles to efficiently extract the seeds from conifer cones, especially those of spruces, hemlocks, and pines.The crossbills feed their young with the same seeds, rather than the insects which other species feed to their chicks.