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.
(CNN) -- Two crew members have died after an engine room fire on a Norwegian cruise ship, Norwegian police confirmed Thursday. Nine people have been taken to the hospital, a spokeswoman for Sunnmore police district told CNN. There were 55 crew on board the ship, MS Nordlys.