All exposed skin is black, as are the claws and bill, though the base of the lower mandible lightens to bluish-gray.

The underparts, breast, and face are orange or yellow; by contrast, the back, wings, and tail are black.

Although the tail is mostly black, the outermost three or four rectrices (flight feathers) are tipped orange, forming a "T" shape.

Adult females, by contrast, have gray-brown upperparts, duller yellow on the breast and underparts, and an olive crown.

Mated pairs of Bullock's orioles cooperate to weave deep, pendant baskets in which are deposited between three and six eggs, though females tend to do much of the work.

[citation needed] Bullock's orioles are native to western North America, though they are sometimes found as vagrants in the eastern half of the continent.

[3] This species can be found as far north as British Columbia in Canada and as far south as Sonora or Durango in Mexico.

[3][4] It is common throughout its range, but is absent in parts of Arizona and Idaho, where a combination of extreme elevation and an arid climate make for poor living conditions.

[3] Observations during the breeding season indicate that members of this species prefer areas with an abundance of cottonwood, pecan, and (if near water) willow.

The young stay at the jelly dish from first feeding in early July and leave late September.