Venomous mammals are animals of the class Mammalia that prouce venom, which they use to kill or disable prey, or to defend themselves from predators. In modern nature, venomous mammals are quite rare. Venom is much more common among other vertebrates; there are many more species of venomous/poisonous reptiles (e.g. snakes), and fish (e.g. stonefish). There are no species of venomous bird; however some birds are poisonous to eat or touch, such as the pitohui, the ifrita, and the Rufous or Little Shrike-thrush. There are only a few species of venomous amphibian - certain salamandrid salamanders can extrude venom-tipped sharp ribs .