VTBIRD February 2010
Increase of sightings of Ivory Gulls / dramatic decrease in their North American population??
Gregory Askew <[log in to unmask]>
Vermont Birds <[log in to unmask]>
Sat, 20 Feb 2010 16:03:31 -0500
The multiple sighting of mature Ivory Gulls so far this winter got me
thinking about what might account for the increase.
Here's some of what I found:
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