BBS Route · Wyoming · BCR 10
Ervay Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 90 species recorded across 31 survey years, still active.
90Species Recorded
31Years Surveyed
1973–2024Span
2Observers
Bird Species Found on Wyoming Ervay
Top 40 of 90 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Vesper Sparrow | Passerellidae | 42 | 2024 | -12% | 1975 | |
| Sage Thrasher | Mimidae | 33 | 2024 | -3% | 1975 | |
| Horned Lark | Alaudidae | 31 | 2024 | -55% | 1975 | |
| Western Meadowlark | Icteridae | 26 | 2024 | -19% | 1975 | |
| Brewer's Sparrow | Passerellidae | 21 | 2024 | +32% | 1975 | |
| Brewer's Blackbird | Icteridae | 16 | 2024 | -22% | 1975 | |
| Mountain Bluebird | Turdidae | 12 | 2024 | +217% | 1975 | |
| Common Grackle | Icteridae | 11 | 2009 | -8% | 1974 | |
| Black-billed Magpie | Corvidae | 8 | 2024 | +173% | 1976 | |
| Red-winged Blackbird | Icteridae | 6 | 2024 | -75% | 1975 | |
| Mallard | Anatidae | 5 | 2024 | +250% | 1983 | |
| American Crow | Corvidae | 4 | 2024 | +129% | 1975 | |
| Pinyon Jay | Corvidae | 4 | 2009 | +100% | 1978 | |
| American Wigeon | Anatidae | 4 | 2022 | +100% | 2011 | |
| Mourning Dove | Columbidae | 3 | 2024 | -46% | 1975 | |
| American Kestrel | Falconidae | 3 | 2024 | -44% | 1975 | |
| Common Nighthawk | Caprimulgidae | 3 | 2024 | -56% | 1975 | |
| Brown-headed Cowbird | Icteridae | 3 | 2024 | +20% | 1987 | |
| Yellow Warbler | Parulidae | 3 | 2024 | -50% | 1975 | |
| Rock Wren | Troglodytidae | 3 | 2024 | +100% | 1975 | |
| Lark Bunting | Passerellidae | 3 | 2023 | -67% | 1977 | |
| Cliff Swallow | Hirundinidae | 3 | 2022 | -36% | 1978 | |
| American Goldfinch | Fringillidae | 3 | 2024 | +25% | 1983 | |
| Song Sparrow | Passerellidae | 3 | 2024 | -14% | 2010 | |
| Western Kingbird | Tyrannidae | 3 | 2012 | +50% | 2011 | |
| Lesser Scaup | Anatidae | 3 | 2018 | n/a | n/a | |
| Green-winged Teal | Anatidae | 3 | 2024 | -50% | 2019 | |
| American White Pelican | Pelecanidae | 3 | 2022 | n/a | n/a | |
| Greater Sage-Grouse | Phasianidae | 2 | 2024 | -65% | 1976 | |
| American Robin | Turdidae | 2 | 2024 | -13% | 1976 | |
| Lark Sparrow | Passerellidae | 2 | 2024 | -76% | 2010 | |
| Loggerhead Shrike | Laniidae | 2 | 2024 | +75% | 1976 | |
| Barn Swallow | Hirundinidae | 2 | 2023 | +20% | 1980 | |
| Wilson's Phalarope | Scolopacidae | 2 | 2009 | +100% | 1976 | |
| Wilson's Snipe | Scolopacidae | 2 | 2023 | -29% | 1979 | |
| European Starling | Sturnidae | 2 | 2024 | +33% | 1978 | |
| Golden Eagle | Accipitridae | 2 | 2024 | -33% | 1984 | |
| Ferruginous Hawk | Accipitridae | 2 | 2024 | +0% | 1986 | |
| Cinnamon Teal | Anatidae | 2 | 2018 | -50% | 1987 | |
| Common Raven | Corvidae | 2 | 2024 | +300% | 2012 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.