"The bodies of these flying beasts resemble porcelain. Both wings feature organs for absorbing atmospheric ether, which is then stockpiled in the head before being used to either blast foes or to self-destruct while defending the colony."
"Murra populations are greatly affected by an area's ether density. When ether is abundant, females are able to reproduce via parthenogenesis, giving rise to exclusively more females. Once herd numbers have stabilized, males are born and sexual reproduction can resume. The ether-absorption abilities of asexually-created murras are lacking however; when the ether density drops, these ones are the first to die, leaving behind their fitter, sexually-produced counterparts."
Types of Murras
Murra is Latin for porcelain.