Date: 2/1/18 12:19 pm From: Carl Lundblad <carl.lundblad...> Subject: Re: [AZNMbirds] Is the Patagonia Red-breasted Sapsucker a hybrid?
It has come to my attention that many expert birders in southern California (in the range of ssp. daggetti) are uncomfortable calling the Patagonia bird a pure Red-breasted and also lean towards either a hybrid or a backcross, so Denny may well be right about this individual (though I think the original remarks were oversimplified and overlooked the intraspecific variation seen in red-breasted). Sapsuckers identification is a pain, given the presence of multiple hybrid zones, introgression, and nearly continuous plumage variation. Even Yellow-bellied may come into contact with Red-breasted in northern British Columbia. When I moved to Nevada, I was very reluctant to label anything remotely ambiguous as a pure red-breasted, but other birders convinced me I was being overly-cautions, and perhaps I've swung too far in the other direction. This is always a good reference to review and review again......: http://www.paradisebirding.com/Paradise%20Birding%20PDFs/steve%20shunk%20publications/Shunk%202005%20Sapsucker%20Hybrids.pdf .
Carl Lundblad Moscow, ID
On Thu, Feb 1, 2018 at 9:21 AM, Carl Lundblad <carl.lundblad...> wrote:
> Hi Denny, > > There is a long history of hybrid Red-breasted X Red-naped Sapsuckers > occurring in southeastern Arizona, and hybrids should always be considered > when encountering red-breasted like sapsuckers outside of their breeding > range. Most (or all) of the previous Red-breasted Sapsuckers from Arizona > have been of the southern race, daggetti, which has a more intermediate > face pattern than your northern/ssp. ruber birds in central Washington. > The more-intermediate face pattern of daggetti indeed makes them tricky to > separate from hybrids, but presumptive hybrids usually show some traces of > a red-naped's black shield/throat frame on the upper breast. Looking at > the various photos of the Patagonia individual that are in eBird, I don't > see any of the black on the upper breast, and the face pattern looks pretty > typical of a daggetti red-breasted. The black and white patterning on the > face in your photo looks a bit more extreme than in many of the other > photos, but I would probably attribute that to some combination of the > weird angle, weird lighting, and or maybe greater feather-wear compared to > earlier in the season. To me, this looks like a very good candidate for a > pure southern/daggetti Red-breasted, and Arizona has a very skilled team of > eBird reviewers who I'm sure have already carefully considered this > question. Other opinions welcome, however. It's not a trivial > identification challenge. > > Respectfully, > > Carl Lundblad > Moscow, ID > > > > On Thu, Feb 1, 2018 at 8:58 AM, Denny Granstrand <dgranstrand...> > wrote: > >> I was in Patagonia yesterday and was given directions to the location of >> the Red-breasted Sapsucker. I found it quickly and got some photos. It >> appears to me that it is a hybrid Red-breasted X Red-naped Sapsucker. The >> red on the head is broken up by the face pattern of a RNSA showing through. >> A pure RBSA should be a nearly complete red head or with only touches of >> black or white around the eye. >> >> Here is the link to my eBird report from yesterday: >> >> https://ebird.org/view/checklist/S42390666 >> >> I live in Yakima, WA. In the forests in Yakima County we frequently see >> mixed pairs of RNSA and RBSA. We also see the hybrid offspring regularly. I >> have photos of hybrids in the Sapsucker folder on my website: >> >> http://www.granstrand.net/gallery/album62 >> >> Some of the hybrid sapsuckers in my photos look just like the one in >> Patagonia. >> >> If you do an eBird search for Red-breasted Sapsucker photos, you will >> find quite a few that look like the one in Patagonia. You will notice, >> though, most of those photos were taken during the winter. Those birds >> undoubtedly were migrants from the sapsucker hybridization zone in the >> Pacific Northwest. >> >> Denny Granstrand >> >> * * * * * * * * * * * * >> Denny Granstrand >> Yakima, WA >> dgranstrand AT gmail.com >> Denny Granstrand's bird photos can be seen at: >> >> www.granstrand.net/gallery/ >> >> Home Page: https://list.arizona.edu/sympa/info/aznmbirds >> To unsubscribe use the Unsubscribe button on that page. >> To view archive: click "Archive" on that page. >> > >