Many species of reptiles and amphibians survive freezing. Ticks can feed on mammals, birds, reptiles, and amphibians. Snakes are elongated, legless, carnivorous reptiles of the suborder Serpentes. Sundarbans is home to many different species of birds, mammals, insects, reptiles and fish. Necrophilia has been observed in mammals, birds, reptiles and frogs. It is entirely smooth muscle in amphibians, reptiles and birds. Their faeces and stomachs contained remains of small mammals, birds, small reptiles, and invertebrates. Meghalaya also has a large variety of mammals, birds, reptiles and insects. The understory is home to a number of birds, small mammals, insects, reptiles, and predators. Lizards form about 60% of the extant non-avian reptiles. Predators of primates include various species of carnivorans, birds of prey, reptiles, and other primates. The scales of birds are thought to be homologous to those of reptiles and mammals. There are a variety of birds, bats, reptiles and invertebrates. It is present in all male reptiles, birds, and mammals. They hunt primarily mice, rats, birds, reptiles, and insects.