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Orcas also prey on larger species such as sperm whales, grey whales, humpback whales and minke whales. [ 84 ] [ 40 ] On three separate occasions in 2019 orcas were recorded to have killed blue whales off the south coast of Western Australia, including an estimated 18–22-meter (59–72 ft) individual. [ 89 ]
"Social Organization and Genealogy of Resident Killer Whales (Orcinus orca) in the Coastal Waters of British Columbia and Washington State". Report of the International Whaling Commission (Special Issue 12). Cambridge: 383– 405. ISSN 0255-2760. Colby, Jason M. (2018). Orca: how we came to know and love the ocean's greatest predator.
In addition to identifying individual whales via their scars and body patterns, Bigg was able to successfully differentiate them by their habits and individual associations. 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.
Though some whale migration routes are known to exceed 8,000km between feeding and breeding grounds, such long-distance movement between longitudes is “atypical”, scientists say.
A killer whale was spotted balancing a salmon on its head. It’s not clear what the behavior means, but orcas were observed doing the same thing in the 1980s.
A humpback whale has made one of the longest and most unusual migrations ever recorded, possibly driven by climate change, scientists say. It was seen in the Pacific Ocean off Colombia in 2017 ...
Humpback whale breach sequence. A breach or a lunge is a leap out of the water, also known as cresting. The distinction between the two is fairly arbitrary: cetacean researcher Hal Whitehead defines a breach as any leap in which at least 40% of the animal's body clears the water, and a lunge as a leap with less than 40% clearance. [2]
It was smaller than the modern killer whale (O. orca), 4 m (13 ft) versus 7 to 10 m (23 to 33 ft), and had around 8 more teeth in its jaw. It may have resembled the modern killer whale in appearance, and could represent a transitional species between the modern killer whale and other dolphins.