page_title: Monotreme
hierarchical_section_title: Monotreme
caption_attribution_description: English: Platypus is a mammal with a beaver tail and a duckbill. Français&#160;: L’ornithorynque est un mammifère avec une queue de castor et un bec de canard. Euskara: Ornitorrinkoa: ugaztuna, hegaztien antzeko muturra, iletsua, arrautzak erruten ditu, igerilari trebea da Deutsch: Schnabeltier Русский: Утконос (Ornithorhynchus anatinus) в Сиднейском аквариуме.
context_page_description: Monotremes are a group of mammals that form the order Monotremata. Monotremes are the only mammals that lay eggs, but they also feed their babies with milk.
  The word 'monotreme' refers to their common rear opening, the cloaca. In amphibia, reptiles, birds and probably all early tetrapods, there is a common opening for urine, reproduction and faeces.
context_section_description: Monotremes are a group of mammals that form the order Monotremata. Monotremes are the only mammals that lay eggs, but they also feed their babies with milk.
  The word 'monotreme' refers to their common rear opening, the cloaca. In amphibia, reptiles, birds and probably all early tetrapods, there is a common opening for urine, reproduction and faeces.
caption: The Platypus, the most well known monotreme.
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