Cedar waxwings are sociable, seen in flocks year round. The nests are usually built using plant fibers, lined with finer materials such as moss, rootlets, fine grass, hair, as also by twigs, weeds, grass, etc. Cedar Waxwing Nest and Eggs. These birds are sociable at all seasons, and it is rare to see just one waxwing. Cedar Waxwing Baby. With thin, lisping cries, flocks of Cedar Waxwings descend on berry-laden trees and hedges, to flutter among the branches as they feast. The nests are built almost 6 to 20 feet, or sometimes even 50 feet, above ground level atop trees or on horizontal limbs or forks. Occasionally a line of waxwings perched on a branch will pass a berry back and forth, from bill to bill, until one of them swallows it. They are non-territorial birds and "will often groom each other." They move from place to place depending on where they can find good sources of berries.