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Re: Winged migration

To: GSP1954@aol.com
Subject: Re: Winged migration
From: John Bois <jbois@umd5.umd.edu>
Date: Wed, 23 Jul 2003 17:47:56 -0400 (EDT)
Cc: dinosaur@usc.edu
In-reply-to: <48.2006a874.2c503a70@aol.com>
Reply-to: jbois@umd5.umd.edu
Sender: owner-dinosaur@usc.edu

On Wed, 23 Jul 2003 GSP1954@aol.com wrote:

> What I am wondering is where they got the figure of 80 million years 
> that birds have ruled the skies. Birds were present almost twice as long, and 
> abundant by the Early Cretaceous, but pterosaurs were still around 65 million 
> years ago. 

Pterosaurs were reduced to a very few niches by 65mya.  Diversity in all
but the largest size ranges was being diminished well before that
time.  Unwin says this, I believe.

Follow-Ups:
- Re: Winged migration
  - From: "James R. Cunningham" <jrccea@bellsouth.net>
- Re: Winged migration
  - From: "Chris Bennett" <cbennett@bridgeport.edu>

References:
- Re: Winged migration
  - From: GSP1954@aol.com

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