A recent story from Mexico may provide some clues. In 2006, a mysterious illness began to affect girls at a boarding school in Chalco, Mexico, near Mexico City. The school, which is run by Roman Catholic nuns, is one of 10 in Asia and Latin America operated by a charity called World Villages for Children in Asia.
There are also several marine mammals like Orca's (killer whales), harbor seals and sea lions that live in the Seattle area in the cold waters of Puget Sound and the Pacific Ocean and feed on the salmon and other fish. Douglas squirrels rely on the the evergreen trees that are native to the area.
Mammals in North American temperate deciduous forests include white-tailed deer, raccoons, opossums, porcupines and red foxes. Animals that live in the temperate deciduous forest must be able to adapt to the changing seasons. Some animals in this biome migrate or hibernate in the winter. Images