Date: 1/4/18 2:28 pm From: Robert O'Brien <baro...> Subject: [obol] Fwd: Re: Horned Larks in the Willamette Valley
Here is the final Horned Lark High Count Table, as amended by others.
*High Counts of Horned Larks Willamette Valley (Compiled from eBird, Bob Obrien)*
(from CBC data)
~100 ~2005 Me
On Tue, Jan 2, 2018 at 6:28 PM, Ashwin S. <orfrigatebird...> wrote:
> Hi all, > > For what it's worth, the high count for Horned Lark in Multnomah County is > 150 on 1/11/2003 by Greg Gillson, at the Rivergate Industrial Area. > Washington County has had an insignificant number of larks over the last > few decades, never more than a few individuals, and probably northern > subspecies (not aware of any Streaked HOLA breeding in Washington County > currently). > > Multnomah County is unusual in that (almost?) all Streaked HOLA breeding > occurs off agricultural land. The two significant locations are the > Rivergate Industrial Area, where large numbers of larks have wintered, and > the Portland Airport area. The number of larks at Rivergate has steadily > declined over the last few years, but there are still several breeding > pairs there. Unfortunately, the Port of Portland has permission to develop > all sites at Rivergate in the new future (within ~5 years). The USFWS held > a public comment period last winter on whether or not to allow this, and I > did write to them in disagreement, but this seemed to have no effect on the > decision. > > The PDX area will naturally become more important if sites at Rivergate > are destroyed. Broughton Beach just north of PDX hosts relatively large > numbers of larks, especially during the fall. Last November I had a flock > of 12 Streaked HOLAs there. Broughton Beach is, however, transitioning out > of suitability for larks as willows are starting to take root. I have no > idea how this will affect lark populations in the airport area, but > probably negatively, as this is a location safe from airplanes and with > plenty of food on the water's edge. Personally, I think most larks at the > airport use Broughton Beach for feeding at least seasonally, but this has > no grounding in scientific observation. > > There is an ongoing effort by Metro to transform the former St. Johns Dump > just south of Smith and Bybee Lakes into a prairie. From the photos I've > seen, the results thus far have been impressive, and there have been some > visiting larks there from time to time. However, Streaked HOLAs are > notorious for extreme site-fidelity. It is dubitable that larks will > colonize the location before sites at Rivergate are destroyed, but one can > only hope. > > Ashwin S. > Beaverton >