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Re: surface/volume ratio and water loss in smallest amniotes
Would the lack of smaller birds/bats/pterosaurs be more of a flight
problem (too small for windy conditions or incoming rain drops)?
Flight at smaller sizes is quite feasible - as Jocelyn pointed out,
insects fly fine at smaller sizes. The dynamics of said flight do
begin to shift as the size gets very small, and therefore the Re
regime shifts, but it does not forbid small size flyers. However,
vertebrate physiology and muscular anatomy may set lower limits on
flapping flight effectiveness.
Assistant Professor of Biology
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