Provides name derivation, locations, size, appearance, characteristics, biology, food habits, seasonal movements, behavior and locomotion, population, and hunting.

Details physical characteristics, distribution and migration map, observed behavior, habitat, diet, life history, and status.

Museum of Zoology describes classification, geographic range, habitat, physical description, reproduction, longevity, behavior, food habits, and status. From University of Michigan.

Characteristics, range, habitat, reproduction, population, and conservation details from National Marine Mammal Laboratory.