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Re: Dinosaur Revolution Review (Baby Fuzz)
Sim Koning <email@example.com> wrote:
> Also, I think we should be careful when making arguments from analogy based
> on extant birds.
Yes, I completely agree. Modern Aves represent an oddball lineage of
theropods that just happened to dribble over the K-Pg boundary.
Although there is no such thing as a "typical" theropod, if there was
one then birds would be the group furthest from it.
> Imagine if we were unaware of the Hoatzin. I suspect many would likely
> express incredulity at the notion that a species of bird could replace clawed
> hands with wings as it matured.
Although certainly not commonplace, the presence in juveniles (and
subsequent loss) of wing-claws isn't that unusual among birds.
Turacos and mouse-birds also have them as juveniles. The hoatzin
happens to be best-known example of this trait because the wing-claws
in this species persist for a very long time.
Wow, I've never seen that before!