THEY ARE..., INVERTEBRATES., VERTEBRATES., THEY ARE..., THE SMALLEST GROUP OF INVERTEBRATES., THE LARGEST GROUP OF INVERTEBRATES., THEY ARE..., OVIPAROUS., VIVIPAROUS., THEY HAVE GOT..., FOUR, SIX, EIGHT, SOME HAVE GOT..., TAIL, WINGS, FEATHERS, FUR, THEY HAVE GOT..., TWO ANTENNAE, TWO WINGS, A TAIL

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