In the Pacific Northwest there are three types of killer whales: resident. transient, and offshore. Transient orcas are rarely observed. They move quickly through an area feeding on seals and other marine mammals. (Resident orcas feed on fish). Transient orcas travel in small groups of less than seven. This was a group of three transient females; three is a very typical number for transients. Individuals fortunate enough to observe orcas in the wild usually see residents, which have a predictable range, making them far easier to find.