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Message: <blockquote data-quote="ceasar" data-source="post: 1639644" data-attributes="member: 26155">Wheeler's RAPTORS of Western North America at page 520 notes:  "Major winter areas are in e. Colorado, w. Kansas, Texas panhandle,.............."  Range map shows all of Kansas as being within the Prairie Falcon's winter range and gives it's status as "uncommon" with 4,300 to 6,000 pairs throughout the Western USA but sparsely distributed.  The book devotes 10 pages to the Prairie Falcon-Falco mexicanus.It devotes 35 pages to the Peregrine Falcon and it's 3 sub species or races and gives it's status as "rare." The range maps show one of the races, "american" has a winter range in eastern Kansas around Topeka.  It is designated as "Rare. Was endangered..."  There is an awful lot of detailed info on both species in this book.Get the book:  ISBN 0691134774  Paperback (Heavy Stock) $29.95.Cordially,BobPS:  Based on a comparison with photos on pages 524-526, your bird is definitely a Prairie Falcon with it's long narrow Whisker, as Etudiant noted, and sparsely marked chest.</blockquote>