Other examples include: 1  Some mating dances, commonly carried out by birds, are examples of fixed action patterns. 2  In these cases, the sign stimulus is typically the presence of the opposite sex. 3  Kelp gull chicks are stimulated by a red spot on the mother's beak to peck at the spot, which induces regurgitation.
Norwegian's 13-ship fleet sails all over the world, with 2015 itineraries lasting anywhere from one to 45 days. The cruise line's most popular routes include Hawaii, Alaska and the Caribbean, with home ports in U.S. cities like Honolulu, Los Angeles, Miami, New York and Seattle.
The US has nine STOVL amphibious assault ships, Italy operates two in the light fleet role, and Spain operates one amphibious assault ship as a STOVL aircraft carrier, giving a total of twelve STOVL carriers in active service; (Thailand has one active STOVL carrier but it no longer has any operational STOVL aircraft in inventory so is used and counted as a helicopter carrier).