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Re: Spinosaurs ate pterosaurs
David Marjanovic wrote:
Had it been a parachuter, it would have had to climb back up the height of
the entire tree each time it had caught one insect. Less efficient even
jumping up from the ground, right?
I suppose that depends on the rate of success. Admittedly, no modern animal
that I know of catches insects by leaping from the ground into the air, or
by snatching them mid-air while parachuting or gliding. The birds and bats
that do this are powered fliers and have excellent maneuverability.
Still I'd say that the short head is a juvenile feature, fitting others in
the same specimen, and that the long 3rd finger argues for a different
ecological niche anyway.
I think you're alluding to the hypothesis that _Epidendrosaurus_ stuck its
extra-long finger into deep and narrow holes in trees to extract grubs - in
the same fashion as the modern aye-aye (_Daubentonia_) of Masagsacar and the
striped possums (_Dactylopsila_ and _Dactylonax_) of Australia and New
Guinea. The aye-aye has the third finger elongated, whereas in the striped
possums it is the fourth finger that is the longest (especially in
Paul Sparks wrote:
I I'd think that it would be even more difficult for a fish to spit at a
in a tree as their primary scheme to feed, but there is a medium size fish
in Brazil that does just that very effeciently.
I know archer fishes (Toxotidae) do this. I've also heard that they prefer
to leap out of the water to snatch the prey with their jaws when the prey is
close enough to the water surface, and only "spit" if the prey is too far,
or they miss with the leap. The prey is actually sitting on overhanging
vegetation at the time, and thus immobile when the fish makes its strike.
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