How do orcas (killer whales) exhibit complex social structures and hunting techniques, and what are some of the differences in behavior between resident and transient pods?

Orcas (Orcinus orca) have complex social structures with pods consisting of family members that cooperate in hunting and communication. Resident pods, which stay in one area, have specific hunting techniques and diets, often focusing on fish. Transient pods, which roam more widely, primarily hunt marine mammals and exhibit different vocalizations and hunting strategies. The social bonds within pods are strong, with individuals showing a high degree of cooperation and shared knowledge.