BBS Route · Texas · BCR 21
Thornton Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 70 species recorded across 16 survey years, no longer active.
70Species Recorded
16Years Surveyed
1968–1984Span
1Observers
Bird Species Found on Texas Thornton
Top 40 of 70 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Western Cattle-Egret | Ardeidae | 140 | 1984 | +805% | 1976 | |
| American Crow | Corvidae | 58 | 1984 | +105% | 1970 | |
| Eastern Meadowlark | Icteridae | 58 | 1984 | -18% | 1970 | |
| Northern Mockingbird | Mimidae | 46 | 1984 | -34% | 1970 | |
| Northern Cardinal | Cardinalidae | 43 | 1984 | +7% | 1970 | |
| Barn Swallow | Hirundinidae | 34 | 1984 | +276% | 1970 | |
| Mourning Dove | Columbidae | 33 | 1984 | -12% | 1970 | |
| Northern Bobwhite | Odontophoridae | 27 | 1984 | -45% | 1970 | |
| Great-tailed Grackle | Icteridae | 23 | 1984 | +84% | 1970 | |
| House Sparrow | Passeridae | 20 | 1984 | +38% | 1970 | |
| Chimney Swift | Apodidae | 15 | 1984 | +28% | 1970 | |
| Turkey Vulture | Cathartidae | 13 | 1984 | +18% | 1970 | |
| Dickcissel | Cardinalidae | 13 | 1983 | +10% | 1970 | |
| European Starling | Sturnidae | 11 | 1984 | +210% | 1970 | |
| Killdeer | Charadriidae | 9 | 1983 | +69% | 1970 | |
| Common Grackle | Icteridae | 9 | 1984 | +208% | 1975 | |
| Carolina Wren | Troglodytidae | 8 | 1984 | +0% | 1970 | |
| Carolina Chickadee | Paridae | 7 | 1984 | +88% | 1970 | |
| Eastern Bluebird | Turdidae | 7 | 1984 | +21% | 1970 | |
| Yellow-billed Cuckoo | Cuculidae | 6 | 1984 | -15% | 1970 | |
| Painted Bunting | Cardinalidae | 6 | 1984 | -67% | 1970 | |
| Red-bellied Woodpecker | Picidae | 5 | 1984 | +118% | 1970 | |
| Tufted Titmouse | Paridae | 5 | 1984 | -48% | 1971 | |
| Cliff Swallow | Hirundinidae | 5 | 1981 | -62% | 1977 | |
| Scissor-tailed Flycatcher | Tyrannidae | 4 | 1984 | -56% | 1970 | |
| Eastern Wood-Pewee | Tyrannidae | 4 | 1984 | -32% | 1970 | |
| Eastern Phoebe | Tyrannidae | 4 | 1982 | +300% | 1969 | |
| Red-tailed Hawk | Accipitridae | 3 | 1984 | +100% | 1971 | |
| Indigo Bunting | Cardinalidae | 3 | 1979 | +200% | 1968 | |
| Great Egret | Ardeidae | 3 | 1984 | -77% | 1969 | |
| Purple Martin | Hirundinidae | 3 | 1984 | -13% | 1971 | |
| Great Blue Heron | Ardeidae | 3 | 1984 | +167% | 1975 | |
| Red-headed Woodpecker | Picidae | 2 | 1980 | -73% | 1969 | |
| Red-winged Blackbird | Icteridae | 2 | 1984 | +109% | 1970 | |
| Lark Sparrow | Passerellidae | 2 | 1984 | -78% | 1970 | |
| Grasshopper Sparrow | Passerellidae | 2 | 1979 | +367% | 1974 | |
| Northern Rough-winged Swallow | Hirundinidae | 2 | 1982 | +100% | 1974 | |
| Little Blue Heron | Ardeidae | 2 | 1982 | +100% | 1977 | |
| White-breasted Nuthatch | Sittidae | 2 | 1979 | n/a | n/a | |
| Eastern Kingbird | Tyrannidae | 1 | 1984 | -38% | 1971 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.