BBS Route · Iowa · BCR 22
Hudson Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 99 species recorded across 33 survey years, still active.
99Species Recorded
33Years Surveyed
1967–2022Span
8Observers
Bird Species Found on Iowa Hudson
Top 40 of 99 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Red-winged Blackbird | Icteridae | 210 | 2022 | +137% | 1969 | |
| European Starling | Sturnidae | 65 | 2022 | +19% | 1969 | |
| House Sparrow | Passeridae | 63 | 2022 | -52% | 1969 | |
| Common Grackle | Icteridae | 54 | 2022 | -76% | 1969 | |
| American Robin | Turdidae | 50 | 2022 | +98% | 1969 | |
| American Crow | Corvidae | 45 | 2022 | +44% | 1969 | |
| Dickcissel | Cardinalidae | 41 | 2022 | -5% | 1969 | |
| Mourning Dove | Columbidae | 31 | 2022 | +41% | 1969 | |
| Northern Cardinal | Cardinalidae | 27 | 2022 | +957% | 1970 | |
| American Goldfinch | Fringillidae | 17 | 2022 | -42% | 1969 | |
| Rock Pigeon | Columbidae | 16 | 2022 | -40% | 1969 | |
| Barn Swallow | Hirundinidae | 16 | 2022 | +11% | 1969 | |
| Brown-headed Cowbird | Icteridae | 15 | 2022 | +178% | 1969 | |
| Song Sparrow | Passerellidae | 15 | 2022 | -21% | 1969 | |
| Blue Jay | Corvidae | 13 | 2022 | +74% | 1969 | |
| Eastern Meadowlark | Icteridae | 13 | 2022 | +300% | 1969 | |
| Northern House Wren | Troglodytidae | 12 | 2022 | -32% | 1969 | |
| Killdeer | Charadriidae | 11 | 2022 | +500% | 1969 | |
| Chipping Sparrow | Passerellidae | 11 | 2022 | +70% | 1969 | |
| Baltimore Oriole | Icteridae | 9 | 2022 | +0% | 1969 | |
| Common Yellowthroat | Parulidae | 9 | 2022 | -5% | 1969 | |
| Tree Swallow | Hirundinidae | 9 | 2022 | +39% | 2007 | |
| Ring-necked Pheasant | Phasianidae | 8 | 2022 | -73% | 1969 | |
| Gray Catbird | Mimidae | 8 | 2022 | +480% | 1969 | |
| Northern Rough-winged Swallow | Hirundinidae | 7 | 2013 | +233% | 1983 | |
| Bobolink | Icteridae | 6 | 2022 | -57% | 1969 | |
| Rose-breasted Grosbeak | Cardinalidae | 6 | 2022 | +11% | 1969 | |
| Black-capped Chickadee | Paridae | 6 | 2022 | +275% | 1981 | |
| Eastern Bluebird | Turdidae | 6 | 2013 | +233% | 1986 | |
| Turkey Vulture | Cathartidae | 6 | 2022 | +400% | 2006 | |
| House Finch | Fringillidae | 6 | 2021 | +0% | 1996 | |
| Indigo Bunting | Cardinalidae | 5 | 2022 | +157% | 1969 | |
| Red-bellied Woodpecker | Picidae | 5 | 2022 | +333% | 1971 | |
| Yellow-billed Cuckoo | Cuculidae | 4 | 2021 | +50% | 1971 | |
| Eastern Wood-Pewee | Tyrannidae | 4 | 2022 | +200% | 1969 | |
| Great Crested Flycatcher | Tyrannidae | 4 | 2022 | +57% | 1979 | |
| Cedar Waxwing | Bombycillidae | 4 | 2022 | +113% | 1981 | |
| Canada Goose | Anatidae | 4 | 2022 | +50% | 1990 | |
| Cooper's Hawk | Accipitridae | 4 | 2013 | n/a | n/a | |
| Red-headed Woodpecker | Picidae | 3 | 2022 | -70% | 1969 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.