Date: 2/2/19 4:32 pm
From: Alvaro Jaramillo <chucao...>
Subject: Re: [SFBirds] Black-legged Kittiwake at Cliff House (2 Feb)
Peter
Yes, the third photo you sent is of a Black-legged Kittiwake. Structurally the legs are too long, eye too small, and bill too large. On plumage the mantle is too pale, and the wing markings more intense than on Red-legged.
Alvaro

Alvaro Jaramillo
<alvaro...>
www.alvarosadventures.com

-----Original Message-----
From: <SFBirds...> <SFBirds...> On Behalf Of Peter Pyle
Sent: Saturday, February 2, 2019 4:21 PM
To: Alvaro Jaramillo <chucao...>
Cc: 'John Sterling' <jsterling...>; 'Ken Schneider' <kschnei1...>; <SFBirds...>
Subject: Re: [SFBirds] Black-legged Kittiwake at Cliff House (2 Feb)

Thanks Joe and Al -

You are probably correct. All of my seabird reference books are boxed up at the moment so all I had was on-line images. There are some of young and winter adult RLKI that appear to show dark tail tips and/or hind collars:

https://www.birds-of-north-america.net/images/Red-legged_Kittiwake-12.jpg
http://orientalbirdimages.org/images/data/redlegged_2.jpg
https://www.naturepl.com/cache/pcache/08135133.jpg

but at least the dark-tipped tails are probably mis-identified BLKIs (e.g., 3rd photo above) as I recall this field mark now that you mention it.

Hard to explain this as oiling, especially the primary coverts, but perhaps this is what it is.

Peter

At 04:04 PM 2/2/2019, Alvaro Jaramillo wrote:
>Looks like it has a black tail tip, eliminating Red-legged. It also
>does not look to have the contrast expected on secondaries and inner
>primaries that Red-legged would show.
>Alvaro
>
>Alvaro Jaramillo
><mailto:<alvaro...><alvaro...>
>www.alvarosadventures.com
>
>From: <SFBirds...> <SFBirds...> On Behalf Of John Sterling
>Sent: Saturday, February 2, 2019 2:24 PM
>To: Peter Pyle <ppyle...>
>Cc: Ken Schneider <kschnei1...>; <SFBirds...>
>Subject: Re: [SFBirds] Black-legged Kittiwake at Cliff House (2 Feb)
>
>good call, Peter
>I’ve never seen an immature black-legged kittiwake with those
>underwing patterns.
>
>
>John Sterling
>VVVVVVVVVVVVVVVVVV
>
>26 Palm Ave
>Woodland, CA 95695
>
>PO Box 1653
>Woodland, CA 95776A
>
>530 908-3836
><mailto:<jsterling...><jsterling...>
>www.sterlingbirds.com
>
>
>On Feb 2, 2019, at 2:05 PM, Peter Pyle
><<mailto:<ppyle...><ppyle...> wrote:
>
>Hi all -
>
>This could be a first-year Red-legged Kittiwake.
>Worth looking into in any case. Not many photos on line of underwings
>of RLKI but here's one that shows a similar pattern:
>
><https://www.birdguides-cdn.com/cdn/gallery/birds/Red-leggedKittiwakeFl
>yte1stS5Commanders1106.jpg>https://www.birdguides-cdn.com/cdn/gallery/b
>irds/Red-leggedKittiwakeFlyte1stS5Commanders1106.jpg
>
>Both the primary coevrts and the tertial area being marked dark. By
>contrast I can't find a BLKI with either. February is the month for
>RLKI in CA.
>
>Thought it worth mentioning in case others want to go look for it.
>
>Peter
>
>At 10:58 AM 2/2/2019, Ken Schneider wrote:
>
>Hi all,
>
>I had brief looks and managed a single photo of an immature
>Black-legged Kittiwake seen just offshore from the Cliff House at about
>0815 this morning. A bit more detail at my eBird checklist here:
><<https://ebird.org/view/checklist/S52301096>https://ebird.org/view/che
>cklist/S52301096>https://ebird.org/view/checklist/S52301096
>
>I think the photo supports my ID, but I'm a little puzzled by the
>apparent dark markings on the underside of the left wing (perhaps the
>primary coverts?), which I don't see as expected in the field guides I
>checked... comments welcome.
>
>Good birding!
>Ken Schneider
>Noe Valley
>
>
>
>
>
>
>
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