* Echidna (_Tachyglossidae_)
* Short-beaked echidna (_Tachyglossus aculeatus_)
* Long-beaked echidna (_Zaglossus bruijnii_)
* Western long-beaked echidna (_Zaglossus attenboroughi_)
* Eastern long-beaked echidna (_Zaglossus bartoni_)
What are examples of monotremes?
* Platypus (_Ornithorhyncus anatinus_)