BBS Route · Washington · BCR 9
Mercer Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 62 species recorded across 49 survey years, still active.
62Species Recorded
49Years Surveyed
1968–2022Span
5Observers
Bird Species Found on Washington Mercer
Top 40 of 62 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Western Meadowlark | Icteridae | 87 | 2022 | +494% | 1970 | |
| Horned Lark | Alaudidae | 49 | 2022 | -85% | 1970 | |
| California Gull | Laridae | 49 | 1985 | +29% | 1977 | |
| Canada Goose | Anatidae | 35 | 2019 | -40% | 2003 | |
| Cliff Swallow | Hirundinidae | 16 | 2021 | +380% | 1995 | |
| Red-winged Blackbird | Icteridae | 15 | 2022 | 13× | 1976 | |
| Bank Swallow | Hirundinidae | 15 | 2006 | 15× | 1972 | |
| Barn Swallow | Hirundinidae | 13 | 2022 | +115% | 1971 | |
| Western Kingbird | Tyrannidae | 13 | 2022 | +210% | 1985 | |
| Common Raven | Corvidae | 12 | 2022 | +313% | 1982 | |
| Mourning Dove | Columbidae | 11 | 2022 | +800% | 1972 | |
| Brewer's Blackbird | Icteridae | 11 | 2022 | +550% | 1976 | |
| Brown-headed Cowbird | Icteridae | 9 | 2022 | +67% | 1990 | |
| House Sparrow | Passeridae | 7 | 2022 | -33% | 1974 | |
| Common Nighthawk | Caprimulgidae | 6 | 2019 | +750% | 1987 | |
| American Robin | Turdidae | 5 | 2022 | +200% | 1988 | |
| Killdeer | Charadriidae | 4 | 2022 | +9% | 1972 | |
| Chukar | Phasianidae | 4 | 1976 | -20% | 1968 | |
| Ring-necked Pheasant | Phasianidae | 4 | 2022 | +175% | 1970 | |
| Red-tailed Hawk | Accipitridae | 4 | 2022 | +117% | 1976 | |
| Savannah Sparrow | Passerellidae | 4 | 2003 | -40% | 1991 | |
| House Finch | Fringillidae | 4 | 2022 | +63% | 1993 | |
| Eurasian Collared-Dove | Columbidae | 4 | 2022 | +92% | 2012 | |
| American Goldfinch | Fringillidae | 3 | 2009 | +20% | 1997 | |
| Double-crested Cormorant | Phalacrocoracidae | 3 | 2003 | -40% | 1998 | |
| California Quail | Odontophoridae | 2 | 2022 | -56% | 1974 | |
| Northern Rough-winged Swallow | Hirundinidae | 2 | 2010 | -17% | 1985 | |
| Eastern Kingbird | Tyrannidae | 2 | 1970 | n/a | n/a | |
| Grasshopper Sparrow | Passerellidae | 2 | 2018 | -46% | 1993 | |
| Long-billed Curlew | Scolopacidae | 2 | 2016 | +175% | 1991 | |
| Lark Sparrow | Passerellidae | 2 | 2022 | +150% | 1993 | |
| American Barn Owl | Tytonidae | 2 | 2015 | n/a | n/a | |
| Yellow-headed Blackbird | Icteridae | 2 | 2021 | n/a | n/a | |
| Ring-billed Gull | Laridae | 1 | 2002 | -95% | 1972 | |
| Prairie Falcon | Falconidae | 1 | 2017 | -20% | 1982 | |
| Black-billed Magpie | Corvidae | 1 | 2019 | -50% | 1971 | |
| American Crow | Corvidae | 1 | 2022 | -90% | 1970 | |
| European Starling | Sturnidae | 1 | 2022 | -77% | 1972 | |
| Loggerhead Shrike | Laniidae | 1 | 2022 | -65% | 1970 | |
| Northern Harrier | Accipitridae | 1 | 2022 | -64% | 1971 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.