Sooty, dusky birds seen on the wing, never resting except in chimneys of houses, or hollow trees, where they nest. Tips of tail feathers with sharp spines, used as props. They show their kinship with the goatsuckers in their nocturnal as well as diurnal habits, their small bills and large mouths for catching insects on the wing, and their weak feet. Gregarious, especially at the nesting season. Chimney Swift.英文原著 · 《Bird Neighbors》
The crows are large black birds, walkers, with stout feet adapted for the purpose. Fond of shifting their residence at different seasons rather than strictly migratory, for, except at the northern limit of range, they remain resident all the year. Gregarious. Sexes alike. Omnivorous feeders, being partly carnivorous, as are also the jays. Both crows and jays inhabit wooded country. Their voices are harsh and clamorous; and their habits are boisterous and bold, particularly the jays. Devoted mates; unpleasant neighbors.英文原著 · 《Bird Neighbors》
Tail more or less forked. Feet small and weak from disuse. Song a twittering warble without power. Gregarious birds. Barn Swallow. Bank Swallow. Cliff (or Eaves) Swallow. Tree Swallow.英文原著 · 《Bird Neighbors》
The wild pigeon is now too rare to be included among our bird neighbors; but its beautiful relative, without the fatally gregarious habit, still nests and sings a-coo-oo-oo to its devoted mate in unfrequented corners of the farm or the borders of woodland. Delicately shaded fawn-colored and bluish plumage. Small heads, protruding breasts. Often seen on ground. Flight strong and rapid, owing to long wings. Mourning or Carolina Dove.英文原著 · 《Bird Neighbors》
Travelling in immense flocks of its own kind, a gregarious bird of the first order, it nevertheless is not the social fellow that its cousin, the red-winged blackbird, is. It especially holds aloof from mankind, and mankind reciprocates its suspicion.英文原著 · 《Bird Neighbors》
Cowbirds are gregarious. The ungrateful young birds, as soon as they are able to go roaming, leave their foster-parents and join the flock of their own kind. In keeping with its unclean habits and unholy life and character, the cowbird's ordinary note is a gurgling, rasping whistle, followed by a few sharp notes.英文原著 · 《Bird Neighbors》