BBS Route · Wisconsin · BCR 23
Casco Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 149 species recorded across 54 survey years, still active.
149Species Recorded
54Years Surveyed
1966–2024Span
7Observers
Bird Species Found on Wisconsin Casco
Top 40 of 149 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Red-winged Blackbird | Icteridae | 81 | 2024 | -46% | 1970 | |
| European Starling | Sturnidae | 44 | 2024 | -35% | 1970 | |
| Canada Goose | Anatidae | 43 | 2023 | +142% | 1989 | |
| Song Sparrow | Passerellidae | 40 | 2024 | +166% | 1970 | |
| American Robin | Turdidae | 40 | 2024 | +94% | 1970 | |
| Cedar Waxwing | Bombycillidae | 36 | 2024 | +943% | 1973 | |
| American Crow | Corvidae | 32 | 2024 | -5% | 1970 | |
| House Sparrow | Passeridae | 31 | 2024 | -64% | 1970 | |
| Chipping Sparrow | Passerellidae | 31 | 2024 | 19× | 1977 | |
| Savannah Sparrow | Passerellidae | 29 | 2024 | -41% | 1970 | |
| Barn Swallow | Hirundinidae | 27 | 2024 | +53% | 1970 | |
| Northern House Wren | Troglodytidae | 24 | 2024 | +560% | 1970 | |
| Cliff Swallow | Hirundinidae | 20 | 2024 | +314% | 1970 | |
| Indigo Bunting | Cardinalidae | 19 | 2024 | +457% | 1970 | |
| Killdeer | Charadriidae | 17 | 2024 | -11% | 1970 | |
| Pine Siskin | Fringillidae | 16 | 1988 | n/a | n/a | |
| Mourning Dove | Columbidae | 15 | 2024 | +354% | 1970 | |
| Red-eyed Vireo | Vireonidae | 15 | 2024 | +463% | 1971 | |
| American White Pelican | Pelecanidae | 14 | 2024 | +14% | 2005 | |
| House Finch | Fringillidae | 13 | 2024 | -16% | 1996 | |
| Rock Pigeon | Columbidae | 11 | 2024 | -12% | 1972 | |
| Eastern Meadowlark | Icteridae | 11 | 2024 | -88% | 1970 | |
| Northern Cardinal | Cardinalidae | 11 | 2024 | +440% | 1977 | |
| Common Grackle | Icteridae | 10 | 2024 | +119% | 1970 | |
| American Goldfinch | Fringillidae | 9 | 2024 | +107% | 1970 | |
| Gray Catbird | Mimidae | 9 | 2024 | +213% | 1972 | |
| Brown-headed Cowbird | Icteridae | 6 | 2024 | +4% | 1970 | |
| Yellow Warbler | Parulidae | 6 | 2024 | +580% | 1971 | |
| Common Yellowthroat | Parulidae | 6 | 2024 | +575% | 1972 | |
| Warbling Vireo | Vireonidae | 6 | 2024 | +633% | 1979 | |
| Eastern Kingbird | Tyrannidae | 5 | 2024 | -14% | 1971 | |
| Eastern Wood-Pewee | Tyrannidae | 5 | 2024 | +75% | 1970 | |
| Purple Martin | Hirundinidae | 5 | 2024 | -79% | 1970 | |
| Scarlet Tanager | Cardinalidae | 5 | 2022 | +14% | 1977 | |
| Blue-winged Teal | Anatidae | 5 | 2023 | -30% | 1995 | |
| Common Raven | Corvidae | 5 | 2023 | -59% | 1998 | |
| Blue Jay | Corvidae | 4 | 2024 | +25% | 1971 | |
| Dickcissel | Cardinalidae | 4 | 2024 | -78% | 1975 | |
| Tree Swallow | Hirundinidae | 4 | 2024 | -56% | 1970 | |
| Horned Lark | Alaudidae | 4 | 2024 | +457% | 1971 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.