[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: on necks and crows
Anyone interested in bird behavior as it (could conceivably) relates
to theropod behavior, check out the work of Kevin McGowan on
crows (not Ravens):
I expect lots to variety in behavior among corvidae, considering
it includes Bluejays, magpies, crows, ravens, ...
I also expect lots of variety occurred among theropods.
John V Jackson wrote:
> --Orig. Message:--From: "Mickey P. Rowe" <firstname.lastname@example.org>
> Date: Fri, 7 May 1999 12:32:51 -0500 (EST)
> In-Reply-To: (message from Frank Galef on Thu, 06 May 1999 22:48:50 -0700)
> >Are you referring to the work of Bernd Heinrich? If so, then my
> understanding (gleaned largely from John Alcock's description in the
> 6th edition of _Animal Behavior_) would be closer to disorderly mobs
> than fammily gatherings at least for Ravens. Specifically, it appears
> that when a Raven finds a carcass before any other Ravens, it will
> keep quiet about it. If there are more than two Ravens feeding at the
> carcass, they will generally squawk to high heaven. As I understand
> the situation, this occurs because Ravens are territorial, and if only
> one or two birds have found a carcass it is likely to either be in
> their territory or they're interloping and don't want to attract the
> attention of the territory's owner. In either case it "belongs" to
> the bird that first found it.
> Primates have been known to keep quiet about food if they think they can
> keep it a secret (I think I'm thinking particularly of a Gombe chimp -
> sorry, no ref for this one).
> I suspect the difference between discovering carrion or even a banana, and a
> cooperational hunt may be significant. In the first case, the issue is the
> share one gets oneself. In the second, before the sharing must come the
> all-important securing of the meal in the first place. Canids for example
> are well known to compete/exercise ranking rights in the one case, and
> cooperate in the other. I expect people are agreed that chimps can
> demonstrate at least the coop. hunting side.