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Hawk ID in Southern Illinois (1 Viewer)
- Thread starter PeteQuad
- Start date
It could very well be a Krider's Red-tailed Hawk. Wheeler's range map places them in this area. The Hawk's head and scapulars fit the description from Wheeler's below as does its almost pure white breast and belly.
Wheeler defines "Krider's" as the "pale morph of B.j.borealis, the Eastern Red-tailed Hawk. See p.255 of the Eastern Edition of "Raptors of North America."
Describing the Head and Body of the Adult Kriders at p.255 he writes:
"HEAD-- In the purest form, the head is all white except for some dark streaking on the nape. Many birds have a small brown patch on the crown and a partial dark malar mark (these may be borealis/calurus intergrades). Throat is always white and unmarked and never has a dark collar. BODY (dorsal)--Dark brown back and forward and rear scapulars are edged with tawny-rufous. A large white mottled area covers the middle two-thirds of the scapulars. ........... ."
I think that the picture in post #1 shows these markings best.
Bob
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Interesting article by Jerry Liguori about Krider's and Harlan's Hawks (which show belly bands) here:
http://jerryliguori.blogspot.com/2014/01/kriders-is-morph-of-calurus.html
5 Pictures of Kriders show differing amounts of head whiteness.
Bob
Thanks, that was very interesting. My photo, especially with the white undertail, looks like some of those photos, but according to that the range is all wrong. On page 68 of my Crossley guide there is a hawk (#3) that looks somewhat similar (lacking a belly band, although the tail is more reddish) that is listed as a "Fuertes", a breed I have not heard about before.
The southern tip of Illinois is well within the Krider's winter range.
Wheelers range maps show the Kriders with a winter range corridor about 200 miles wide following the Mississippi river south to New Orleans beginning up around Des Moines, Ia on the west side of the river down to Houston, Texas. On the East side of the river from Southern Illinois down through Western KY and Tennessee and all of Alabama.
The Fuertes RT Hawk, B. j. furetesi , is a sub-species of the RTH found from SE Texas through Central and Western Texas and Northern Mexico. It has a light colored and sparsely patterned chest, belly and flanks and a red colored tail.
Bob
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Ah ok then, this was really the very southern tip of Illinois at Horseshoe Lake Conservation Area. I am tempted to call this a Kriders as I am not seeing any other matching subspecies from the plumage. It struck me when I saw it, this very white raptor sitting there.
TLeukering
Well-known member
This is a fairly typical Eastern (borealis) Red-tailed Hawk, adults of which at the mid-latitudes of the Lower 48 typically lack, or nearly so, a belly band. The head is far too dark for Krider's. Finally, Eastern Red-taileds usually look pale-tailed from below, because they are. The orangish coloration is primarily on the upper sides of the rectrices.
