Changes

===Feeding===

===Feeding===

The diet of killer whales is often geographic or population specific. In the eastern North Pacific, the "resident" killer whale populations mainly feed on [[salmonid]]s such as Chinook and chum [[salmon]], while the "transient" population feeds on other marine mammals, such as Dall's [[porpoise]]s, Pacific white-sided [[dolphin]]s, California and Steller [[sea lion]]s, harbor [[seal]]s, sea [[otter]]s, and even large [[baleen whale]]s. Off the coast of Norway, killer whales mainly feed on [[herring]] and other schooling fish, often in a coordinated manner. In waters off New Zealand, killer whales feed on stingrays and sharks. Finally, in Antarctic waters, some killer whales hunt marine mammals and penguins, while others (presumably belonging to a different population) are observed feeding on Antarctic toothfish (Dissostichus mawsoni) and other fish species.

The diet of killer whales is often geographic or population specific. In the eastern North Pacific, the "resident" killer whale populations mainly feed on [[salmonid]]s such as Chinook and chum [[salmon]], while the "transient" population feeds on other marine mammals, such as Dall's [[porpoise]]s, Pacific white-sided [[dolphin]]s, California and [[Steller sea lion]]s, [[harbor seal]]s, sea [[otter]]s, and even large [[baleen whale]]s. Off the coast of Norway, killer whales mainly feed on [[herring]] and other schooling fish, often in a coordinated manner. In waters off New Zealand, killer whales feed on stingrays and sharks. Finally, in Antarctic waters, some killer whales hunt marine mammals and penguins, while others (presumably belonging to a different population) are observed feeding on Antarctic toothfish (Dissostichus mawsoni) and other fish species.

===Social habits===  

===Social habits===