Includes IUCN status and reasons, identification, range and population, ecology, and threats, as well as current and proposed conservation measures.

Gives pictures, locations, habitat, description, behavior, breeding and parenting, lifespan, feeding habits, ecosystem roles, and status.

Covers pictures, audio clip, size, appearance, similar birds, summer and winter ranges and habitats, food, reproduction, and conservation status.

Gives description, breeding and non-breeding range and habitat, diet, foraging, and nest type, in addition to images, sounds, and distribution map.

Tells about range and regions, habitat, physical features, mating and parenting, nesting behavior, food habits, predation, and status.

Describes appearance, classification, size, status, conservation, threats, locations, biomes, biology, and videos.

University of Michigan ADW gives geographic distribution, biomes, physical appearance, reproduction, diet, population estimates, and threats.

Details physical characteristics, geographic range, habitat, diet, behavior and reproduction, interaction with people, and conservation status.

Furnishes image, range map, name, range, nests, parenting, fast facts, audio, video, and printable factsheet. From National Geographic Animals.

Short article offers status, family, range, population, and link to information on Important Bird Areas.

Combines date and area listed with names, appearance, size, behavior, reproduction, and threats.

National Geographic offers picture, range map, fast facts, location, size, behavior, coloring, colonies, threats, audio clip, and printable sheet.