How do different mammals hear sounds? | Britannica

Mammals Lesson for Kids: Definition, Facts & Characteristics

Australia’s endangered animals | The Nature Conservancy Australia

This is Australia’s equivalent of a porcupine. We call them echidnas. Along with our platypuses, echidnas belong to a special group of mammals called monotremes which lay eggs like a bird while suckling their young with milk like other mammals. Australia and Papua New Guinea are the only places on Earth where monotremes are found. #FloraAndFaunaFriday | Australian High Commission, Ghana