From Animal Diversity Web, offers images and sounds, subspecies populations, coloring of adults and young, mating system, captive lifespan, flocks, migration, diet and ecosystem roles.

Nature File from NatureWorks offers photographs, classification, physical characteristics, diet, migration, mating, nesting, and distribution.

Offers labeled coloring sheet, sounds, subspecies, migration, coloration, shape, primary diet, nesting, and clutch size.

Gives personal observation, overview, range map, description by age and gender, tracks, feeding behavior, habitat, nesting, enemies, migration, and activities.