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SV: Question -- was shaking bird trees



Probably not. Three diminutive species of flightless Acanthisittidae are
known (Dendroscansor decurvirostris, Pachyplicas yaldwyni, Traversia
lyalli). It should be noted that most flightless birds are extinct, and
that bones of small passerines are very often overlooked if they are not
specifically searched for.

Tommy Tyrberg

-----Ursprungligt meddelande-----
Från: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu] För don
ohmes
Skickat: den 27 juni 2008 20:28
Till: dinosaur@usc.edu
Ämne: Question -- was shaking bird trees

This brought to mind something I meant to look up before I got so lazy.

What is the smallest bird known to have lost it's flight ability? Is
there a well-defined size threshold below which flight is rarely or
never lost?

Don

--- On Fri, 6/27/08, T. Michael Keesey <keesey@gmail.com> wrote:

> From: T. Michael Keesey <keesey@gmail.com>
> Subject: Re: Shaking up the bird family tree
> To: "Dinosaur Mailing List" <dinosaur@usc.edu>
> Date: Friday, June 27, 2008, 1:16 PM
> On Fri, Jun 27, 2008 at 9:48 AM, David Marjanovic
> <david.marjanovic@gmx.at> wrote:
> >
> > Much more often among rails alone -- 2000 years ago,
> every small Pacific
> > island had its own species of flightless rail, and the
> big ones had two or
> > three, never mind the occasional flightless parrot or
> duck or ibis or...
> 
> Right, see, I knew I was missing some stuff (although I
> think I
> counted 1 for parrots and 1 for anserids).
> 
> On another note: is there a single instance in all of
> _Bilateria_ of a
> lineage losing flight and then regaining it? (Tinamous
> aside for the
> moment.)
> -- 
> T. Michael Keesey
> Director of Technology
> Exopolis, Inc.
> 2894 Rowena Avenue Ste. B
> Los Angeles, California 90039
> http://exopolis.com/
> --
> http://3lbmonkeybrain.blogspot.com/
> http://dragabok.blogspot.com/