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In a message dated 96-08-01 16:46:27 EDT, range@inlink.com (Mark Sumner)

> Is the BCF theory basically that "birds" consisted of 
> tree-climbing, non-flying dinosaurs who gradually
> diverge into ground-dwelling theropods and flying
> birds?  In other words, that there is a whole group
> of root-stock small birdlike dinosaur yet undiscovered? 

In a nutshell, you bet. Not quite undiscovered, though. Among these small
birdlike dinosaurs are _Longisquama_ and _Protoavis_ (at least, the small,
theropodlike portion of the type specimen, which may be composite).