Jan 22 2009

Which Chickadee Are You?

Published by at 7:23 am under Songbirds

Black-capped Chickadee (photo by Chuck Tague)Most birders east of the Rocky Mountains never have to ask this question, but along an east-west line that surrounds the southwest corner of Pennsylvania it’s an important question indeed.  It’s one I often ask myself as I travel around the region.

Two species of chickadees live here – black-capped and carolina - and they look a lot alike. 

Because chickadees are non-migratory you can usually be certain of the species based on your location in eastern North America:  black-caps live in the north, carolinas live south.  But around here you have to think about the line – are you on the black-capped or carolina side? – and you have to check field marks.

Black-capped chickadees have white on their wings that looks like an inverted hockey stick, their sides are olive and the edge of their black bib is a ragged line.  They sing a two-note song (fee-bee) and slowly say “chick-a-dee, chick-a-dee-dee.”  They live in the Laurel Highlands and north of Pittsburgh so if you’re in either of those places you can be fairly certain of the species. 

Carolina chickadees live in Allegheny County and further south.  They’re smaller with proportionally shorter tails, they don’t have the hockey stick shape on their wings, they have less olive on their sides and the border of their black bibs is more distinct.  Their song is four notes (fee-bee-fee-bay) and their chickadee call is much faster.  The guides say song is the best field mark.

But notice how these descriptions are all comparatives of “more this” and “less that” than the other species.  Since it’s unlikely you will find these species next to each other it’s not very helpful to compare them, especially when you’re on the chickadee dividing line. 

And there are further complications.  Along the dividing line they can expand or contract their ranges, they borrow each others’ songs and – even worse – they hybridize!  When that happens the only way to tell them apart is by a DNA test.

So have a little patience with those of us who live on the chickadee border.  If we say we’ve seen a “chickadee species” it’s because we left our DNA kits at home.  ;-)

(photo of a Black-capped Chickadee by Chuck Tague)

3 responses so far

3 Responses to “Which Chickadee Are You?”

  1. Marcy Cunkelmanon 22 Jan 2009 at 8:07 pm

    Our yard was the first confirmed Carolina Chickadee back on March 27th, 2007 on my 50th Birthday for an Indiana County record…I had heard it for a while, but my birding mentor, Margaret Higbee came and I didn’t tell her.. ( I was weeding and watching her when she came.)She got the Chickadee as soon as she got out the car…she came running up the ramp so excited…. I just smiled and she said do you know what I just saw and heard? I already knew it was a Carolina Chickadee…Nice BD present…a new yard bird #153 for our new yard and a visit from a birding friend…Now I hear and see the Chickadees and we do have hybrids here(they nest here)…so I am trying to get a definite photo of the Carolina…seems they like to stay in the woods more than the Black-capped….they are one of my favorite birds..Chick-a-dee-dee-dee…

    (Sorry I don’t have the DNA kit either…would be nice to have some banded to see exactly what we do have flying in the yard.)

  2. Kate St. Johnon 22 Jan 2009 at 9:20 pm

    My mother has lived both north and south of the chickadee line and reminded me that the black-capped chickadees seem much more tame than carolina chickadees. This seems true to me because people tell me about chickadees that will eat out of their hands – but the stories always seem to come from the black-capped side of the chickadee border.

    Anyone have any experience hand-feeding chickadees? What species?

  3. The Zen Birdfeederon 24 Jan 2009 at 10:14 pm

    I’m clearly in Black-capped territory here but would love to be tested on the line between the two to tell them apart. Nice post.

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