A full-color drawing of the habitus
Dorsal view of the skull
Ventral view of the skull
Lateral view of the skull
Dorsal view of the mandible
A walrus on an ice-floe
Distribution map
, RUTTING WHISTLES OF A MALE PACIFIC WALRUS (Odobenus rosmarus divergens), Walruses are extremely social animals which use a number of sensory modalities to exchange information with conspecifics. The most conspicuous signals are in air sounds, but underwater sounds are also produced. One of the in air sounds is a 'rutting whistle', produced by male walruses in spring. Fay et al. (1984) describe walruses in the Bering Sea producing loud whistles when swimming alongside a herd of female walruses,