Amphibians present are frogs, toads and newts. There are amphibnians like toads, frogs and tree frogs. Amphibians of frogs, toads, and salamanders are all common residents. Amphibians include numerous toads and frogs in the American Southwest. They eat almost any animal they can overpower, including rodents, frogs, toads, and lizards. Toads and frogs reveal themselves when it rains. Anurans are the amphibians lacking a tail such as frogs and toads. Keelback snakes have glands that secrete poison they ingest from eating poisonous toads. Bufo toad is found in the skin and glands of Bufo toads. A ranavirus transmitted to alpine newts from midwife toads in Spain caused bleeding and necrosis. Toads and many other amphibians display breeding site fidelity. Paul Collier has an idea for a new pregnancy service involving toads and tadpoles. The spadefoot toads of North America are also adapted to underground life. Numerous native species have been reported as successfully preying on toads. The spadefoot toads ("Scaphiopus spp.") of North America fall into this category.