[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

RE: Early mammals ate dinosaurs



Its because, rather than "pure" predator or scavenger,
animals are all opportunists :)


--- Richard Swigart <rswigart@yahoo.com> wrote:

> All,
>  
> 
> Eric Allen <erallen@yahoo.com> wrote:
> 
> <snip> The article addresses the idea that the
> dinosaur was
> scavenged, but points out that scavengers are
> relitavely rare in mammal species (at least extant
> ones). <snip> 
> 
> Regarding extant scavengers.  My professors taught
> that the only true extant scavengers were birds! 
> All other animals that would scavenge would do so as
> the oportunity presented itself; however, they are
> all primarily hunters.
> 
> Soaring birds may be full time scavengers because
> they can cover so much territory with very little
> cost [flies use more energy, but there are so darn
> many of them].  A walking animal [including T. rex
> -- sorry Dr. Curry] trying to survive on scavenging
> is taking a huge risk that he/she will run across a
> dead carcass before he/she runs out of the energy
> the last carcass provided. 
> 
> remember back when the scavenging hyenas were found
> so discussing -- until they were studied in depth;
> it turned out they killed a higher percent of their
> diet than Lions!
> 
> My point [finally] is that the word scavenger should
> not be mistaken for a way of life [niche].  Just
> because you find remains of a scavenged meal inside
> an animal does not automaticall mean the animal is a
> "scavenger."  All, including us, will eat carcass
> meat if we can find a fresh carcass.  Europeans
> reported that Native Americans would search the
> rivers in spring to collect bison that had fallen
> through the ice and drowned -- and we are the
> predator supreme.
> 
> Richard Swigart
> 
>               
> ---------------------------------
> Do you Yahoo!?
>  Yahoo! Mail - Easier than ever with enhanced
> search. Learn more.
> 



                
__________________________________ 
Do you Yahoo!? 
The all-new My Yahoo! - Get yours free! 
http://my.yahoo.com