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.

Notable Species of Warhammer 40,000
Major: Eldar, including Dark Eldar Humans, including Abhumans Necrons Orks Tau Tyranids
Minor: Ambull Araklionid Barghesi Banelings Bale Childers Drahendra Caradochians Cimmeriac
Cryptos Cythor Fiends Demiurg Donarathi Drugh Dracoliths Drax Enoulian
Enslavers Fra'al Galg Gykon Hrud Jokaero Jorgall K'nib
Kathaps Khrave Kinebrach Kroot L'Huraxi Lacrymole Laer Lelith
Loxatl Medusae Megarachnids Nekulli Nicassar Old Ones Q'Orl Rak'gol
Rangda Reek Reptos Saharduin Saruthi Scythian Simulacra Slann
Slaugth Sslyth Stryxis Tarellian Thexian Thraxian Thyrrus Tushepta
Umbra Ur-Ghul Vespid Watchers in the Dark Whishperers Xenarch Yu'Vath Zoats