Savannas are a type of grassland ecosystem found in tropical and subtropical regions. They are characterized by their open canopy of scattered trees, and the presence of large herbivores such as zebras, giraffes, and elephants. Savannas are also home to a variety of other animals, including predators such as lions, cheetahs, and hyenas. The climate of savannas is typically hot and dry, with seasonal rainfall. Savannas are important habitats for many species, and provide resources for humans such as grazing land and firewood.