[Tweeters] eBird guidance on Common vs Short-billed Gull;
loss of NW Crow
ucd880 at comcast.net
Tue Aug 17 10:51:50 PDT 2021
One question I have is about the Crows. I presume that at one time they were "good" species with breeding barriers (habitat) in place. At some point, these broke down due to settlement . But, at one time in the not too distant past they were 2 species. Consequently, any sighting pre-(some date) could be presumed to be Northwestern Crow and should be retained on life-lists. They just became extinct, in some ways similar to what the swamping by Barred Owls is doing to Spotteds.
Board of Directors, Ecologists Without Borders http://ecowb.org/
ucd880 at comcast.net
> On 08/17/2021 10:43 AM J Christian Kessler <1northraven at gmail.com> wrote:
> have to wonder what was wrong with the name "Mew" that neither side of the split continues with that name.
> Chris Kessler
> On Tue, Aug 17, 2021 at 10:07 AM Steve Hampton <stevechampton at gmail.com mailto:stevechampton at gmail.com > wrote:
> > > eBird's taxonomic updates finally rolled out this morning. Two things:
> > 1) Mew Gull is now split into Short-billed Gull (North America) and Common Gull (Eurasia). 99.999% of the time, the correct entry will be Short-billed Gull. I assume county reviewers will be removing Common Gull if there are no prior records in their area (such as for "Kamchatka" Common Gull, the most likely Common Gull to reach the PNW).
> > 2) Northwestern Crow is no more; it was lumped with American Crow last summer after a study showed a vast intragration zone between the two.
> > Note the splitting and lumping is done by the American Ornithological Society each summer. It takes eBird a while to update their software.
> > --
> > Steve Hampton
> > Port Townsend, WA
> > Qatay, S'Klallam territory
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> Rustin Thompson
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