Date: 1/5/21 1:13 pm From: Ben Pearl <bpearl...> Subject: Re: [southbaybirds] [pen-bird] Snowy Plover (Charadrius nivosus)
Hi Joe and all,
Thank you very much for the sighting! Although many of the Snowy Plovers we color band also winter in the SF Bay, some disperse across the coast each year during winter (and they sometimes decide to breed elsewhere). Understanding where they go to is vital information that helps us to better understand Snowy Plover survival, migration, and use of habitat across the Pacific Coast. If you ever observe a color banded Snowy Plover on the Pacific Coast, you can send your sightings to <snpl_bandreporting...> , which is a listserv that goes directly to all Snowy Plover banders across the Pacific Coast. You will get a quick response from the bander with the history of the banded bird(s) observed, and we will get this important data much faster than if reported to the USGS Bird Banding Laboratory.
I appreciate your sharing additional information about Snowy Plovers, however I wanted to provide a bit of clarification since it can get a little confusing. The Pacific Coast Population of Western Snowy Plovers (*Charadrius nivosus nivosus*), which are found adjacent to tidal waters of the Pacific within 50 miles of the coast, are a Distinct Population Segment listed by the USFWS as Threatened under the Endangered Species Act (ESA). There is also an interior population of Snowy Plovers that breed in the Central Valley, Great Basin, and Southern Plains, and many of these birds also winter on the Pacific Coast. However, research has shown that there is close to zero movement of individuals between the coastal and interior populations during the breeding season, and thus they are considered distinct populations. The interior population is not currently listed under the Federal ESA, though it is listed on some states' ESA and may warrant federal listing in the near future.The IUCN list, which classifies Snowy Plovers as Near Threatened, does not consider the lack of gene flow between the two populations, and thus considers them to be one population.
On Tue, Jan 5, 2021 at 1:53 AM Joe Morlan <jmorlan...> wrote:
> 02 January 2021. Pigeon Point, California, USA. > > I was covering my area for the Ano Nuevo Christmas Bird Count when I took > this photo. Notice the colored bands on this bird's legs. Ben Pearl of the > San Francisco Bay Bird Observatory advised me that he banded this > individual as a chick in Mountain View California on 05 August 2020 and > that its whereabouts were unknown until I took this photo. Thus it moved > from San Francisco Bay flying over the Santa Cruz Mountains to the Pacific > Coast, more than 25 miles from where it was hatched. Ben called it "ko:ag" > (black over orange on left, aqua over green on right) and provided a photo > of it as a chick which he kindly allowed me to use... > > https://fog.ccsf.edu/~jmorlan/SnowyPloverChick.htm > > This vulnerable species is classified as "Near Threatened." It was formerly > lumped with the similar Kentish Plover (Charadrius alexandrinus) of > Eurasia. > > Additional photo: > > https://macaulaylibrary.org/asset/293772601 > > Stay well! > -- > Joseph Morlan, Pacifica, CA > "It turns out we're very good at not seeing things" - Jack Hitt > > > > > >
-- Ben Pearl, M.S. Plover and Tern Program Director San Francisco Bay Bird Observatory 524 Valley Way Milpitas CA 95035 Office: 408.946.6548 ext 206 Cell: 805.550.0881 www.sfbbo.org
Please be discreet in disclosing locations of nesting birds. Disclosure of nests for Owls and Raptors is prohibited. -=-=- Group Owner: southbaybirds+<owner...> Unsubscribe: https://groups.io/g/southbaybirds/unsub [<lists...>] -=-=-=-=-=-=-=-=-=-=-=-