At 02:17 2006-03-17, dannj@alphalink.com.au wrote:
That depends on whether the system found in birds is an adaptation to flight or not. Excreting a paste in flight would seem to be easier than urinating or passing solids, and being able to squirt it out at speed no doubt helps prevent feathers being fowled.
Flying foxes aren't quite so lucky - they sometimes urinate all over themselves while hanging upside-down.