Western Red-tailed Hawk in central Ohio: An annual visitor?

This adult dark intermediate (dark rufous) morph individual was photographed near Glacier Ridge Metro park in Union Co. OH on 6 March 2014.  It may have also been photographed in this area in February of 2009 (Gene Stauffer), and November of 2011 (Irina Shulgina).

This adult dark intermediate (dark rufous) morph Western Red-tailed Hawk (B. j. calurus) was photographed near Glacier Ridge Metro park in Union Co. OH on 6 March 2014. It may have also been photographed in this area in February of 2009 (Gene Stauffer), and November of 2011 (Irina Shulgina).

Red-tailed Hawks (Buteo jamaicensis) are ubiquitous in North America, and are probably the most abundant and familiar raptor.  They’re also very diverse with over a half-dozen subspecies, a few of which are strikingly polymorphic showing a continuum of color morphs ranging from almost solid black down to very pale. Not to mention solid white individuals that pop up from time to time. But when different Red-tailed Hawk subspecies show up as vagrants on the wrong side of the continent, how often do we noticing them?

In the west, both Harlan’s (B. j. harlanii) and Western Red-tails (B. j. calurs) come in a whole range of colors, from light to nearly black, and these are typically categorized as either light, light intermediate, intermediate, dark intermediate, or dark, with very few birds being solidly dark enough to qualify for the latter category.  Westerns tend to show lots of rusty/rufous tones in contrast to the colder colors of most Harlan’s, so when talking about Westerns many often relabel the above categories using “rufous” instead of “intermediate.” It’s all rather unfortunate terminology, really, as most non-experts are prone to call any bird darker than a typical light morph a “dark” Red-tailed hawk.

Dark Adult Western Red-tailed Hawk in Union Co, along US-33 by Irina Shulgina, on 5 March 2014.The same bird as above, along US-33 in Union Co. on 5 March 2014.
Photo (C) Irina Shulgina.

In the eastern part of the continent, the Eastern Red-tailed Hawk (B. j. borealis) dominates, and is in fact the only subspecies you’ll likely encounter save the Northern Red-tail (B. j. abieticolis) which may just be variation within borealis and not be a legit subspecies, but is distinctive in that it appears to be a bit more richly colored, and more heavily streaked, than other borealis (sensu lato).  That said, there is currently zero evidence that these eastern subspecies exhibit and dark or intermediate morphs.

In any case, the big “take home message” here is that very dark birds (from light intermediate on up to dark) encountered anywhere in the U.S. are very likely to be one of the two western subspecies: harlanii or calurus.

So what does all this have to do with the central Ohio bird?

First, this dark intermediate (aka dark rufous) individual is a pretty typical dark rufous Western in all respects.  No question about the ID once you dig into the details.

Second, and most intriguing, is that reports of a darker Western (calurus) bird have been surfacing from this area west of Columbus, OH sine February of 2009!!!  Given the great rarity of these western birds in the east, I can’t help but wonder this isn’t the same bird returning year after year to the same area during winter! 

eBird Reports of Western Red-tailed Hawk near the eastern border of Franklin Co., Ohio.

eBird Reports of Western Red-tailed Hawk near the eastern border of Franklin Co., Ohio.

Update:  Below is Gene Stauffer’s photo of possibly the same bird from 9 February 2009, just a short flight from where I and other have seen the bird during early March, 2014.

"Western" Red-tailed Hawk (B. j. calurus)

Photo taken on 9 Feb 2009 by Gene Stauffer (shared here with his permission)
at the entrance to Glacier Ridge Metro Park in Union County, north east near Columbus, OH.
eBird Checklist: ebird.org/ebird/view/checklist?subID=S4550854

For additional photos of the Central Ohio bird(s) depicted above, see these photos and perhaps others on Irina Shulgina’s Flickr page.   These include photos from March 2014, and from what appears to be the same or a very similar bird on 11-10-2012 a few miles south of the above locations along Amity Rd. (Franklin County).

These darker western birds also prompt another question: how frequently do light morph western birds (yes, both calurus and harlanii have light morphs), including Krider’s, stray into the east? How many of these are we overlooking? As far as I can tell, most western (i.e., calurus and harlanii) Red-tailed Hawks that are observed in the east are darker morphs, which understandably stick out like a sore thumb against the backdrop of our entirely light morph Eastern Red-tails (B. j. borealis), but I suspect that many light morph western birds simply go unnoticed.

Perhaps some day I’ll find the time to put together an informative “crash course” in subspecific Red-tailed Hawk ID, but until that happens, you may want to check out some of the resources below. Additionally, consider purchasing (or acquiring through your local library) the Wheeler Guide to Raptors of Western North America and other raptor-specific field guides that treat these subspecies in detail, and of course make it a point to chase after any western birds that show up in your area and/or pay attention to the local Red-tails next time you find yourself west of the Central Time Zone.

Related Online Resources:

Iron, J. Dark morph Red-tailed Hawk: calurus or abieticola? TOC Newsletter, February 2012, Toronto Ornithological Club. http://www.jeaniron.ca/2012/darkredtailsTOCNews.pdf

Liguori, J., and B. Sullivan. 2010. Comparison of Harlan’s with Western and Eastern Red-tailed Hawks. Birding 42(2)2:30-37. http://www.aba.org/birding/v42n2p30.pdf

Liguori, J. 2004. Dark Red-tailed Hawks. Birding 36(3): 278-83. http://www.aba.org/birding/v36n5p500.pdf

Pittaway, R. 1993. Subspecies and Morphs of the Red-tailed Hawk in Ontario Birds 11(1): 23-29. Ontario Field Ornithologists. http://www.jeaniron.ca/2010/redtailsRF.pdf

This entry was posted in Uncategorized. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s