[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: The life of birds
--Original Message-- From: Jaime A. Headden <email@example.com>: 05
December 1998 07:40
>Monkey puzzle trees were certainly climbable, very large
>branches and kinda shaggy bark. It's the surface, really, and not the
>branches that matter.
Ooo, well if I were shinning up a monkey puzzle, I agree the surface
certainly WOULD matter to me! :-)
> I do kinda like the ground up theory in which the ancestral
>dinosaur, (oh, say, *Eoraptor*; we'll call it a "whatever" for now,
>pending Holtz and Padian) scrambled up trees to get at bugs and flying
>lizards, with perfectly adapted wrists, and spawning the terrestrial
>lineage that kept that multi-task function of the hand, and later
>spawned birds, who adapted (okay, exapted) the wrist to fly. Birds are
>spawned by arboreal "whatevers", and terrestrial theropods arose from
Excuse me sir - do you own this theory? ;-)
>Thus birds were both ground-up and trees-down,
>but that's just one possible take on things.
I like that theory too, though I'm not sure I think the name
"ground up" is quite right for it ! I realise one of your "whatevers" came
out as arboreal when it probably should have been terrestrial , but the
question still remains, why did the whatevers take from Eoraptor to the
Tithonian before suddenly enlarging the hand?