Caspian Tern, Cottonwood Marsh, Boulder Co

Charles Hundertmark

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Sep 7, 2020, 1:33:01 PM9/7/20

to Cobirds

With Forster’s Tern.

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Mike Hensley

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Sep 7, 2020, 3:56:00 PM9/7/20

to Colorado Birds

The terns are still present and fairly active, although I believe the Forster's Tern to actually be a juvenile Caspian. In flight, both birds have the blackish wingtip undersides. Really embarrassingly bad digiscope pics available for anyone interested.

Mike Hensley

Lafayette, CO

Charles Hundertmark

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Sep 7, 2020, 4:18:28 PM9/7/20

to miked...@gmail.com, Colorado Birds

I think Mike is right re the second tern being a juvenile Caspian rather than a Forster’s. Just looked at my photos and the legs are black.

Chuck Hundertmark

Lafayette, CO

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On Sep 7, 2020, at 1:56 PM, Mike Hensley <miked...@gmail.com> wrote:

The terns are still present and fairly active, although I believe the Forster's Tern to actually be a juvenile Caspian. In flight, both birds have the blackish wingtip undersides. Really embarrassingly bad digiscope pics available for anyone interested.

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