🚀 go-pugleaf

In article <1992Jul23.010953.6388@math.ucla.edu> barry@arnold.math.ucla.edu (Barry Merriman) writes:
>In article <10018@vice.ICO.TEK.COM> hall@vice.ICO.TEK.COM (Hal Lillywhite)  
>writes:
>> And I find it peculiar that although there are blue birds, there are
>> no blue raptors that I know of.  Can you imagine the advantage a sky-
>> blue hawk would have?  His prey would have a very difficult time seeing 
>> him until it was too late.  I wonder why such an obvious advantage 
>> seems not to have developed.

>Actually, he should be blue on the bottom and dark on top,
>so that he ends up blending in when viewed from above or below.
>Thats "why" fish are silver on the bottom and dark on top, perhaps

Some carnivorous birds have adopted this strategy - penguins. However the
important factor which hawks and other raptors do not have in common with
penguins is that penguins are subject to in-flight predation. (The word flight
can be applied here in the best fluid dynamic tradition.) Now many land based
predators use camouflage - (polar bears, tigers, etc.) - and owls use important
flight silencing techniques. So I don't know why raptors don't seem to have
such a strategy.

Later,
Andrew Mullhaupt