Reviews size and appearance, distribution, pods, migration, photoidentification in Alaska, diet and food habits, reproduction, and sources of mortality.

Explains species, classification, name, description, feeding, mating, natural history, and status.

Provides pictures, classification, geographic range, habitat, physical description, reproduction, longevity, behavior, food habits, and status.

Offers description, diet, communication, habitat and range, reproduction, population, classification, and links to activities.

Covers status, description, size, population, lifespan, range, habitat, food, behavior, offspring, threats, and protection.

University of Guelph details description, distribution, reproduction, ecology, and behavior.

Image and range map accompany species profile, fast facts, sounds, gallery, and printable factsheet.

Explores name, classification, general description, physical characteristics, diet and teeth, activities, senses and communication, and lifespan.

HowStuffWorks gives history of names and reputation, size and appearance, history, social structure, communication, and feeding habits.