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 South Korean navy has 68,000 personnel with 12 submarines, 22 destroyers and frigates, 21 corvettes, and 84 patrol vessels. But raw numbers don't tell the whole story. Most of North Korea's equipment is very old. Its main warships and warplanes date back to the 1970s and, in some cases, even the '50s.