There are several main types of ecosystems: deserts, grasslands, and forests. Deserts have very hot and dry weather, and plants and animals must survive with little water. Common desert animals include kangaroo rats and cacti. Grasslands are dry, flat lands that can be hot in summer and cold in winter, covered with grass and home to animals like bison and coyotes. Forests include tropical rainforests with hot, wet weather all year housing jaguars and monkeys, deciduous forests with warm summers and cold winters for rabbits and deer, and coniferous forests with cool summers and cold winters for evergreen trees like pines.