Mystery Bird: Chestnut-backed Chickadee, Poecile rufescens

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[Mystery bird] Chestnut-backed Chickadee, Poecile rufescens, photographed at San Rafael, California. [I will identify this bird for you in 48 hours]

Image: Joseph Kennedy, 25 December 2007 [larger view].

Nikon D200, Kowa 883 telescope with TSN-PZ camera eyepiece 1/320s f/8.0 at 1000.0mm iso400.

Please name at least one field mark that supports your identification.

Review all mystery birds to date.

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Love those birdie butts!

Oh Grrl, you gave this away yesterday when you showed what is probably the same bird in the same tree (American Sweetgum, Liquidambar styraciflua)... this is a Chestnut-backed Chickadee, Poecile rufescens: dark gray wing feathers, underparts white to pale grayish-white, with rufous flanks... this is probably the subspecies P. r. neglectus whose range is coastal central California (Marin County) and specifically has relatively narrow rufous bands on the flanks.

The other two subspecies are: the nominate rufescens ranging from Alaska south to northwest California (broad rufous bands on flanks); and barlowi whose range is coastal southwestern California, south of San Francisco Bay (almost no rufous color on flanks)

(p.s. San Rafael is in Marin County, California)

I also immediately spotted the weird seed-pod thingies hanging from the tree in both pictures, and color of the feathers to the left of the tail and under the wings can also be found on the front view of the bird in the earlier picture. Not enough to prove it's the same bird, but that's the way I'm going to bet.

I have that same tree species in my front yard (no chestnut-backed chickadees this far south, but I'll go with that for the ID, too).

Cute shot. :-)

david; yeah, i know, but then decided that none of my mystery bird people reads my relocation essays, but i guessed wrong, didn't i?

but i ask myself; what's cuter than a birdie butt? so i had to share the image anyway.

LOL Grrl, but remember I am not an ornithologist but a biophiliac and "intuitive naturalist" and so color, shadow, vegetation, context, location, psychology, and an obsession for getting it right all play a part! (I guess that is why I prefer the obscure, the non-American/European, and the investigative mystery species more than glamor shots of a Chipping Sparrow- LOL!)

i love digging up those images, david, so i will be asking my photography colleagues for more of those to give you something challenging. thanks for the guidance.