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 Vikings actually built a number of different types of ships, with each one varying depending on the purpose. The Drekkar, Snekke and Skeid were all longships, which were stealthy warships primarily used to carry troops. The ships were about 30 meters long and had room for up to about 18 pairs of oarsmen.The ships could quickly cross the ocean using their sail power and then once closer to shore, they would switch to oars to run attacks on undefended towns and monasteries.he ships were about 30 meters long and had room for up to about 18 pairs of oarsmen. The ships could quickly cross the ocean using their sail power and then once closer to shore, they would switch to oars to run attacks on undefended towns and monasteries.