Document Type
Report
Publication Date
12-2022
Subjects
Western Snowy Plover (Charadrius nivosus nivosus) -- Habitat
Abstract
We monitored the distribution, abundance and productivity of the federally threatened Western Snowy Plover (Charadrius nivosus nivosus) along the central and south coast of Oregon from 1 April – 15 September 2022. We surveyed and monitored plover activity in a project area that included, from north to south, Sutton Beach, Siltcoos River estuary, the Dunes Overlook, North Tahkenitch Creek, Tenmile Creek, Coos Bay North Spit, Bandon Snowy Plover Management Area, New River Habitat Restoration Area (HRA) and adjacent lands, and Floras Lake. Our objectives for the project area in 2022 were to: 1) estimate the size of the adult Snowy Plover population, 2) locate plover nests, 3) determine nest success, 4) implement nest protection as appropriate (e.g. ropes and signs), 5) monitor a sample of broods to determine brood fate and plover productivity, and 6) use cameras and observational data to document predator activity at nests.
We estimated the resident number of Snowy Plovers in Oregon at 508 individuals, the first decline since 2016. We monitored 529 nests in 2022. Overall apparent nest success was 24%. Nest failures were attributed to unknown depredation, unknown cause, corvid depredation, unknown avian depredation, harrier depredation, abandonment, mammalian depredation, one egg nest, wind/weather, overwashing, gull depredation, and infertility. We sampled 90 of 125 known broods that produced 96 fledglings and estimated 130 total fledglings. Overall brood success was 72%, fledging success was 44%, and based on the overall number of resident males, 0.49 chicks fledged per resident male.
Rights
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Persistent Identifier
https://archives.pdx.edu/ds/psu/39281
Citation Details
Lauten, David J.; Castelein, Kathleen A.; Farrar, Daniel; Lee, Mary; and Gaines, Eleanor P., "The Distribution and Reproductive Success of the Western Snowy Plover along the Oregon Coast - 2022" (2022). Institute for Natural Resources Publications. 43.
https://archives.pdx.edu/ds/psu/39281
Description
In partnership with Coos Bay District Bureau of Land Management, Siuslaw National Forest, U.S. Fish and Wildlife Service, Oregon Department of Fish and Wildlife, Oregon Parks and Recreation Department, and U.S. Army Cops of Engineers Portland District.