Khrave

The Khrave are mentioned fairly often as far as lesser xenos species go, and from what we know of, they are "chiropteran mind eaters". Apparently they differ from the various other bat people of 40k mainly the vampires/nostrafex in the fact that they don't shapeshift, don't always have wings, and can vary in size to an extreme degree, with smaller members of the species being roughly man sized, and larger ones being bigger than ogryn. They also bear insectoid features, though what these features are in particular is not known.