Fairy (Podkayne of Mars)

Fairies are a semi-sapient species of small, winged creatures from the planet Venus.

Biology
Fairies are small flying creatures, only superficially humanoid, but regarded as remarkably cute by Humans. Their bodies are covered in fur, part of which is green and shaped like a ballet tutu. Their faces have slanted eyes and a permanent smile that makes them appear friendly. Since their diet is carnivorous, they also have claws and sharp teeth.

Fairies are semi-sapient, with brains about twice the size of a cat's brain, and capable of speaking at least some words in Human languages. They live in large colonies.

In spite of their appearance, Fairies are not mammalian and don't breastfeed their young. However, both males and females "nurse" their young in some undisclosed way which serves the same purpose (possibly they regurgitate food?). They also practice parental care in other ways such as by protecting their young and teaching them how to fly.

Culture and society
In spite of their carnivorous nature, they appear to be somewhat friendly. Even Fairies employed to guard certain locations will display no sign of hostility provided one doesn't try to get past them. When Fairies do attack, however, they can be surprisingly dangerous in spite of their small size.

Appearances

 * Podkayne of Mars, by Robert A. Heinlein (1963)