A male Mountain Bluebird feeds his mate
A male Mountain Bluebird frequently feeds his mate while she is incubating and brooding. As the male approaches with food, the female may beg fledgling-style—with open beak, quivering wings, and begging calls. More often, she waits until her mate perches nearby, then silently flicks the wing farthest from him—a signal that usually sends him off to find her a snack. www.allaboutbirds.org/guide/Mountain_Bluebird
A male Mountain Bluebird feeds his mate
A male Mountain Bluebird frequently feeds his mate while she is incubating and brooding. As the male approaches with food, the female may beg fledgling-style—with open beak, quivering wings, and begging calls. More often, she waits until her mate perches nearby, then silently flicks the wing farthest from him—a signal that usually sends him off to find her a snack. www.allaboutbirds.org/guide/Mountain_Bluebird