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Females do not mature until they are 10 to 13 years old, and gestation is approximately 15 months. [10] With the female maintaining care for her calf until it is two years old, orcas are only able to produce a calf once every 39 months, and thus cannot recover quickly from population decline.
Orcas also prey on larger species such as sperm whales, grey whales, humpback whales and minke whales. [ 83 ] [ 39 ] 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. [ 88 ]
Wanda was a mature North Pacific offshore ecotype, as confirmed by much later DNA analysis. [22] The orca was spotted by boaters alone near Newport Beach, California, on 17 November 1961, and reports reached Marineland of the Pacific. "Marineland officials said the 5,000-pound (2,300 kg), 17-foot (5.2 m) long female might have ventured into ...
The Story of Tahlequah: A Grieving Mother. Tahlequah, a member of the J pod of orcas in the Pacific Northwest, first gained global recognition in 2018 when she gave birth to a calf that died ...
Iceberg is the name of an all-white, mature male orca (killer whale) that was filmed and photographed in 2010 off the north-east coast of Russia. He is one of the first adult all-white orca bulls discovered in the wild.
Northern resident orcas, also known as northern resident killer whales (NRKW), are one of four separate, non-interbreeding communities of the exclusively fish-eating ecotype of orca in the northeast portion of the North Pacific Ocean.
An orca was spotted with a “salmon hat” in Puget Sound in Washington on Oct. 25 — the first time since 1987. Jim Pasola/Orca Newtwork
Orcas or killer whales have a cosmopolitan distribution and several distinct populations or types have been documented or suggested. Three to five types of orcas may be distinct enough to be considered different races , [ 1 ] subspecies , or possibly even species [ 2 ] (see species problem ).