RE: [CALBIRDS] Great Knot id
I would be wary about using pictures from Australia in mid-August since these might be first summer birds that spend the whole austral winter there rather than birds that had come back from Siberia. Is there anyone in Cairns who could comment on this? I would be pretty surprised if migrant Great Knots from Siberia make it back to Aus by mid-August. They generally don't get to Korea or Japan until late July/early August.
Obviously none of the birds here are as heavily marked as the SD bird, but if they are first-summers it wouldn't be a fair comparison.
From: Joseph Morlan [mailto:jmorlan@...]
Sent: Tuesday, September 01, 2009 11:24 AM
To: Lethaby, Nick
Cc: CALBIRDS@yahoogroups.com; SDBIRDS@yahoogroups.com
Subject: Re: [CALBIRDS] Great Knot id
On Sat, 29 Aug 2009 23:36:11 -0000, "n_lethaby" <nlethaby@...> wrote:
>Without finding more photographs of adults in worn-breeding plumage, it's hard to do a lot more analysis. However, I didn't see anything else that seemed a major strike against a Great Knot. However, Surfbirds are similar enough in many respects that it might be hard to find differences from a hybird.
For additional comparison, I photographed a small flock of molting adult
Great Knots in mid-August 2005 at Cairns, Australia.
The photo is at:
Also I checked the text of the following book and can find no mention of
hybrids between the Surfbird and any other species:
McCarthy, E. 2006. Handbook of Avian Hybrids of the World. Oxford Univ.
Joseph Morlan, Pacifica, CA jmorlan (at) ccsf.edu
SF Birding Classes start Sept. 15 http://fog.ccsf.edu/~jmorlan/
California Bird Records Committee http://www.californiabirds.org/
Western Field Ornithologists http://www.westernfieldornithologists.org/