Mike,

I think you might have misunderstood the point Tony
Leukering's post from ID Frontiers. Hybridization with a
species that migrates longer distances, like Herring or
Glaucous Gulls, could make the offspring of those matings
more likely to migrate longer distances than a pure GBBG.
So even though GBBG x Glaucous or Herring are rare, those
rare individuals may be more likely to migrate to WA than a
pure GBBG.

Cliff



----- Original Message -----
From: "MIECHEL TABAK" <mtabak at shaw.ca>
To: <tweeters at u.washington.edu>
Sent: Friday, January 23, 2004 1:35 AM
Subject: Re; gull hybridization


| fact is hybridization in GBBG is rare. This is the
exception in GBBG and
| not the rule. Agreed there are a few apparent hybrid
GBBG, with GBBG X
| Herrring Gull and GBBG x Glaucous Gulls seen very rarely .