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RE: New Feathered Dinosaur



Just a wild guess, but wouldn't prolonged flight (including soaring)
*require* insulation of some type in any animal, due to the heat loss
associated with sustained passage of air over (relative to body volume)
large body surfaces?

Can anyone propose an animal (other than insect) that fits the above flight
profiles that is *not* insulated in some way?

cheers, martin