Re: [cobirds] Possible Arctic Tern, Chatfield Douglas, Co.

[Glenn and Laurie]

Here are some pictures of the juvenile plumage, Arctic Tern from Chatfield.  

http://www.pbase.com/gwalbek/2015_birds

He has been sitting on the end of the sandspit, taking off to fill up on 
gizzard shad and returning to the sandspit.  At first glance he could be 
overlooked as a Common Tern, but aging the bird helps determine it’s ID.  The 
white secondaries with white-tipped, secondary coverts should not appear in any 
plumage Common Tern.  Additionally, Common Tern should show a dark secondary 
bar in all plumages except Alternate, which this bird clearly is not.

Glenn Walbek
Castle Rock, CO

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Re: [cobirds] Possible Arctic Tern, Chatfield Douglas, Co.

[Scott Somershoe]

I didn't see any terns at the sandpit or elsewhere around chatfield between
345-440.

Scott Somershoe
Littleton CO.

On Friday, October 2, 2015, Glenn and Laurie  wrote:

> Here are some pictures of the juvenile plumage, Arctic Tern from
> Chatfield.
>
> http://www.pbase.com/gwalbek/2015_birds
>
> He has been sitting on the end of the sandspit, taking off to fill up on
> gizzard shad and returning to the sandspit.  At first glance he could be
> overlooked as a Common Tern, but aging the bird helps determine it’s ID.
> The white secondaries with white-tipped, secondary coverts should not
> appear in any plumage Common Tern.  Additionally, Common Tern should show a
> dark secondary bar in all plumages except Alternate, which this bird
> clearly is not.
>
> Glenn Walbek
> Castle Rock, CO
>
>
>
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Re: [cobirds] Possible Arctic Tern, Chatfield Douglas, Co.

[Tom Behnfield]

At around 5:30 this evening, I spotted this Tern that looks quite a bit like 
that seen by Glenn today. What leads me to believe this is the same Arctic Tern 
is the rounded head, lighter carpal bar and pale gray primaries. I've attached 
a picture, which as usual is nowhere as good as Glenn's fine shots.

I can only hope..

www.flickr.com/photos/behnfield/21874197016

Good birding!

Tom Behnfield
Lakewood, CO
behnfi...@q.com
www.flickr.com/photos/behnfield

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Re: [cobirds] Possible Arctic Tern, Chatfield Douglas, Co.

[Tom Behnfield]

Forgot to mention that this was also at the end of the Chatfield Marina 
Sandspit (Douglas County.

Tom Behnfield
Lakewood, CO
behnfi...@q.com
www.flickr.com/photos/behnfield

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