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Re: Phorusrhacids killing large mammals in National Geographic Channel



> Predators are behaviourally limited by what has been
> demonstrated to
> them when they are learning how to hunt; there's evidence
> of this for
> pretty much everything exothermic.  (Don't know about
> crocs and
> monitors.)  You get peregrines in the middle of a
> grouse moor
> preferentially eating ducks, you get house cats that have
> no idea how to
> take small songbirds because no one ever showed them as
> kittens, 
I have to disagree. Cats that have never been outside the house will show 
intense interest in birds they see, and will attempt to capture them. They 
often don't seem to know quite what to do after that though. But they still end 
up killing and often eating the birds. After all they will chase laser dots, 
stuff hanging from strings,etc.
If it is small and moving, they will try to sneak up on it and pounce or give 
chase.