As nouns the difference between platypus and robin
is that platypus
is an egg-laying, semi-aquatic mammal with a bill resembling that of a duck, that has a mole-like body, a tail resembling that of a beaver, a waterproof pelt, and flat webbed feet — males have poisonous spurs on the inside of the back legs; Ornithorhynchus anatinus
robin is various passerine birds (about 100 species) of the families Muscicapidae, Turdidae and Petroicidae (formerly family: Eopsaltridae
), typically with a red breast.
As a proper noun Robin is
a given name derived from Germanic.