In common with the goldfinch, the waxwings are late breeders, making their nests in June, July, and August. They seem to prefer rather small trees and low ones, nesting in orchard trees and in ornamental shrubbery as well as in shade trees. The nest is not usually an elaborate affair, but rather loosely made of twigs, grass, rootlets, and leaves, often lined with grape-vine bark, thus hinting that the species has sprung from an original tropical stock, which necessarily makes its nest as cool and airy as practicable. The eggs are unique among the smaller ones, in their steely bluish-gray ground, rather evenly overlaid with dots and scratches of dark brown or black, thus presenting an aggressiveness out of all harmony with the birds. But the peculiar colors and pattern aid greatly in rendering the eggs inconspicuous in the nest, as anyone may prove by noticing them as they lie on their bed of rootlets or leaves. They are usually four in number in this locality, but may vary somewhat according to the season and individual characteristics.
The food of the waxwing is varied both according to season and other conditions. Wild fruit, berries, and seeds form much of their food during the fall and winter months. Mr. A. W. Butler states that, "in winter nothing attracts them so much as the hack-berry (_Celtis occidentalis_). Some years, early in spring, they are found living upon red buds." The investigations of the food of this species by Professor F. E. L. Beal prove that the greater share of it consists of wild fruit or seeds with a very small allowance of cultivated fruits. Animal matter forms a relatively small proportion of the food, but this small proportion by no means indicates the insect-feeding habits of the birds. It might well be suspected that so varied a diet would enable the birds to accommodate themselves to almost any conditions, largely feeding upon the food which happens to be the most abundant at the time. Thus, an outbreak of any insect pest calls the waxwings in large flocks which destroy great numbers to the almost entire exclusion of fruit as a diet for the time. It cannot be denied that the waxwings do sometimes destroy not a little early fruit, calling down upon them righteous indignation; but at other times they more than make amends for the mischief done.