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- Newsgroups: rec.birds
- Path: sparky!uunet!cs.utexas.edu!torn!utzoo!tony
- From: tony@zoo.toronto.edu (Anthony L. Lang)
- Subject: Re: Scrub Jays caching.
- Message-ID: <BzqADC.Iqo@zoo.toronto.edu>
- Date: Wed, 23 Dec 1992 20:03:11 GMT
- Organization: U of Toronto Zoology
- Lines: 26
-
- In article: <BzMv0o.1GM@well.sf.ca.us>
- lp@well.sf.ca.us (Lily Pond) writes:
- >
- >A scrub jay has begun coming and taking peanuts from my hand (!) and then
- >flying off and hiding them - I've seen this a number of times - including
- >for a hiding place the pile of garden clippings where the jay carefully
- >covered the peanut with the clippings.
- >
- >So. Is this jay a male or female? and why do they do what appears really
- >fairly inefficient?
- >
- >
- Both sexes cache food. In fact it is a very efficient way
- to save food resources for hard times. However, they
- only cache abundant food supplies. Caching wouldn't have
- evolved if they weren't making a net gain in energy and
- reproductive success over their life time.
- In fact another corvid, the GRAY JAY
- (Perisoreus canidensis) also caches in order to begin
- nesting in February in the northern coniferous forests.
- Their young are fed primarily cached food.
- --
-
- Anthony Lang
- Dept. of Zoology,
- University of Toronto
-