Tree Swallow

A male and female tree swallow (Tachycineta bicolor) are seen in flight, with one positioned upside down and seemingly feeding the other, whose belly is turned toward the viewer. The author refers to this bird as the white-bellied swallow (Hirundo bicolor, Vieill.), and describes it as follows:

Its flight is easy, continued, and capable of being greatly protracted. It is seen sailing, circling, turning, and winding in all directions, during the greater part of the day. Like all other Swallows, it feeds on the wing, unceasingly pursuing insects of various kinds, and in seizing them producing a snapping noise, which may be heard at some distance.