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The primary diet of transient orcas includes harbor seals, Steller sea lions, harbor porpoises, Dall's porpoises, Pacific white-sided dolphins, and Minke whales. Among these, the harbor seal is the most common prey; one survey estimated that more than half of the diet of transients in the Salish Sea region consists of harbor seals. [ 16 ]
Over 2,000 individual resident-like orcas and 130 transient-like orcas have been identified off Russia. [29] At least 195 individual orcas have been cataloged in the eastern tropical Pacific, ranging from Baja California and the Gulf of California in the north to the northwest coast of South America in the south and west towards Hawaii. [31]
As with residents and transients, the lifestyle of these whales appears to reflect their diet; fish-eating orcas off Norway have resident-like social structures, while mammal-eating orcas in Argentina and the Crozet Islands behave more like transients. [121] Orcas of the same sex and age group may engage in physical contact and synchronous ...
A pair of orca whales were spotted sharing a meal along the Channel Islands off the coast of Southern California, video uploaded on June 27 shows.Drone footage captured by Evan Brodsky shows the ...
A2 Nicola (1927-1989), was one of the most famous and recognizable killer whales of the coast. She was Tsitika's mother and died in 1989, causing her daughter to become the matriarch. As Nicola was the oldest female of the subpod when the study began in the Pacific Northwest in 1973, it was first named "A2 subpod" and was later changed to A30.
Like the Southern residents, the Northern residents live in groups of matrilines. A typical Northern resident matriline group consists of an elder female, her offspring, and the offspring of her daughters. Both males and female orcas remain within their natal matriline for life. [4] Matrilines have a tendency to split apart over time. [3]