To some, platypuses may be considered to be unusual because they are unique to Australia and one of only two types of mammals to lay eggs instead of giving birth to live young. (The other type is the echidna.)
The platypus's appearance is also unusual - it has a flat, broad bill; a sleek and streamlined body; a short, thick tail; the male has a venomous spur, and its feet have retractable webbing. It uses its sensitive bill which is equipped with electroreceptors to find food underwater.
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There are many animals equally strange, and Australians do not regard the platypus as strange at all. To some, platypuses may be considered to be strange because they are unique to Australia and one of only two types of mammals to lay eggs instead of giving birth to live young. (The other type is the echidna.) The platypus's appearance is also unusual - it has a bill which some liken to that of a duck, although it is very different, a sleek and streamlined otter-like body, a short, thick tail like a beaver, the male has a venomous spur, and its feet are webbed. It uses its sensitive bill which is equipped with electroreceptors to find food underwater.
i don't think so that platypus is the world's strangest animal but we can say that it is the 2nd strangest animal in the world and in 1st is the whale and in 3rd is the "Green Anaconda".