Date: 8/28/19 9:55 am From: Deb Evers <okbookwoman...> Subject: [cobirds] Re: Sex change
Well, you certainly caught our attention with your subject heading, Dave!
On Tuesday, August 27, 2019 at 8:12:57 PM UTC-6, Dave Leatherman wrote: > > The Calliope Hummingbird pic I posted from just e of Grandview Cemetery > today is probably a young male rather than a young female like I stated. > Dave Steingraeber, who has an extensive hummingbird feeding operation on > the southwest side of Horsetooth Reservoir, extensive experience, and an > extensive bird literature collection, is the one who suggested this > change. Mostly this is based on how the rows of spots which contain the > few pink gorget feathers match the rows of elongated "streamers" one sees > on an adult male, and also some statements that the beginnings of color on > the throats of male can be simply round feathers and not necessarily > elongated ones. There is a fairly good illustration of this in the 7th > edition of National Geo field guide. To refresh your memory: > > > > Dave Leatherman > Fort Collins >