[boo] Re: Birders' Bonanza, Conservationists' Concern
- From: Joel Geier <joel.geier@xxxxxxxx>
- To: Oregon Birders OnLine <obol@xxxxxxxxxxxxx>
- Date: Mon, 29 Aug 2016 09:36:15 -0700
Lars Norgren wrote:
What age have all these sandpipers been? I've assumed they were
immatures,
hence a very productive breeding season.
The implied hypothesis:
-> An unusually productive breeding season is responsible for the high
numbers of Buff-bellied/Baird's/Semipalmated Sandpipers showing up west
of their main migration route.
could be tested by checking if number of juveniles, and
juvenile-to-adult ratios, are up by a corresponding factor, at places
along their usual migration routes where there are systematic shorebird
surveys.
--
Joel Geier
Camp Adair area north of Corvallis
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