Thanks to Noel Wamer and Dave Hedeen for answering that riddle; Dave, who has noticed the surprising dimorphism elsewhere, provides this quote from Sibley (which I had not succeeded in laying my hands on earlier):

"Male of both species [including Sharp-tailed] is larger than female, especially Pectoral, in which male averages 50 percent heavier and 10 percent longer-winged than female. Other measurements are less dimorphic, so the size difference is much more obvious in flight than on the ground." -- p.184 [Pretty noticeable on the ground! BB]

Brad ---------------------------------------------------------------------------- Brad Bergstrom, Ph.D., Professor TEL 229-333-5770 /-5759 Department of Biology FAX 229-245-6585 Valdosta State University e-mail: bergstrm@valdosta.edu Valdosta, GA 31698-0015 Home: 229-333-0743 Home Page-- http://www.valdosta.edu/~bergstrm/ ----------------------------------------------------------------------------

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