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Message: <blockquote data-quote="Kirk Roth" data-source="post: 1883113" data-attributes="member: 85015">Going through my correspondence, it was actually in '08, so go figure.  While digging around, I found this link:<a href="http://www.globalraptors.org/grin/downloads/RRF2008_Annual_Meeting_Abstracts.pdf" target="_blank">http://www.globalraptors.org/grin/downloads/RRF2008_Annual_Meeting_Abstracts.pdf</a>On page 6 is an abstract from Bill explaining that most Krider's he examined in museums were misidentified light-morph Harlan's.I do feel that the diagnosis of a Krider's hawk is problematic.  Bernard Hoopes' type specimens are both juveniles, so a weak argument could be made that an adult Krider's is an undefinable entity.  All I can speak for is the midwest, but a great many observers here aren't even aware that light-morph Harlan's even exist, plus many leucistic but otherwise typical borealis get passed off as Krider's.  In this sense, at least some "Krider's" are indeed Harlan's or typical borealis.  To tie this all together - in light of Liguori and Sullivan's description of Krider's breeding range, I don't think a Krider's could possibly be Harlan's, unless the definition (and range) of a Harlan's were changed quite a bit.  This makes for an interesting supposition, however, if you'll be kind enough to follow:  The Hull paper uses borealis from Wisconsin for genetic sampling, which is not too far from Minnesota and Iowa, where Krider's seem to have been reported widely (not least of all from Krider himself in "Forty Years Notes of a Field Ornithologist"!).  IF Krider's = Harlan's and IF Hull's data includes some Kridersy genes in the borealis sample, then there would be no difference between the gene sets.  Now, these are big and likely false "ifs," but it makes for some fun food for thought, doesn't it?</blockquote>

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