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Transient or Bigg's: The diets of these orcas consist almost exclusively of marine mammals. [ 6 ] [ 8 ] They live in the same areas as residents, but the two avoid each other. [ 15 ] [ 16 ] [ 17 ] Transients generally travel in small groups, usually of two to six animals, but sometimes on rare occasions pods merge into groups of 200.
The orca (Orcinus orca), or killer whale, is a toothed whale and the largest member of the oceanic dolphin family. It is the only extant species in the genus Orcinus and is recognizable by its black-and-white patterned body. A cosmopolitan species, it is found in diverse marine environments, from Arctic to Antarctic regions to tropical seas.
Bigg was the first to identify transient orcas as significantly different in eating habits, behavior, and distribution from resident orcas; hence they bear his name. His recommendation in the late 1970s that orcas be placed on the endangered list in Canada fueled interest in protecting the animals throughout the region.
To do this, McInnis and others examined sightings and photographs of 49 different orcas from 1997 to 2021 to see if they had been cataloged in any other existing orca population.
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Bigg's killer whales were the most frequently documented last year, and many finding food sources in the Hood Canal. Transient whales, whose Salish Sea visits are increasing, spending time in Hood ...
Killer whales are among the most well-known cosmopolitan species on the planet, as they maintain several different resident and transient (migratory) populations in every major oceanic body on Earth, from the Arctic Circle to Antarctica and every coastal and open-water region in-between.
The southern resident orcas, also known as the southern resident killer whales (SRKW), are the smallest of four communities of the exclusively fish-eating ecotype of orca in the northeast Pacific Ocean. The southern resident orcas form a closed society with no emigration or dispersal of individuals, and no gene flow with other orca populations ...