BBS Route · Texas · BCR 21
Gause Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 87 species recorded across 30 survey years, no longer active.
87Species Recorded
30Years Surveyed
1967–1997Span
4Observers
Bird Species Found on Texas Gause
Top 40 of 87 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Northern Cardinal | Cardinalidae | 84 | 1997 | +1% | 1970 | |
| Mourning Dove | Columbidae | 61 | 1997 | -37% | 1970 | |
| Northern Mockingbird | Mimidae | 58 | 1997 | +8% | 1970 | |
| Great-tailed Grackle | Icteridae | 50 | 1997 | -39% | 1970 | |
| American Crow | Corvidae | 40 | 1997 | +67% | 1970 | |
| Painted Bunting | Cardinalidae | 37 | 1997 | +83% | 1970 | |
| Common Grackle | Icteridae | 33 | 1997 | +117% | 1970 | |
| Barn Swallow | Hirundinidae | 24 | 1997 | 13× | 1971 | |
| House Sparrow | Passeridae | 22 | 1997 | -86% | 1970 | |
| White-eyed Vireo | Vireonidae | 20 | 1997 | +100% | 1972 | |
| Dickcissel | Cardinalidae | 18 | 1997 | +15% | 1972 | |
| Eastern Meadowlark | Icteridae | 17 | 1997 | -80% | 1970 | |
| Northern Rough-winged Swallow | Hirundinidae | 17 | 1989 | +114% | 1978 | |
| Scissor-tailed Flycatcher | Tyrannidae | 16 | 1997 | -23% | 1970 | |
| Brown-headed Cowbird | Icteridae | 15 | 1997 | -62% | 1970 | |
| Carolina Wren | Troglodytidae | 14 | 1997 | +60% | 1970 | |
| Turkey Vulture | Cathartidae | 12 | 1997 | -61% | 1970 | |
| Chimney Swift | Apodidae | 11 | 1997 | +24% | 1970 | |
| Carolina Chickadee | Paridae | 11 | 1997 | +10% | 1970 | |
| Blue-gray Gnatcatcher | Polioptilidae | 11 | 1997 | +64% | 1993 | |
| Inca Dove | Columbidae | 11 | 1997 | +217% | 1993 | |
| Yellow-billed Cuckoo | Cuculidae | 9 | 1997 | -38% | 1970 | |
| Cave Swallow | Hirundinidae | 9 | 1997 | +200% | 1995 | |
| Blue Jay | Corvidae | 7 | 1997 | -6% | 1970 | |
| European Starling | Sturnidae | 7 | 1997 | +67% | 1971 | |
| Red-winged Blackbird | Icteridae | 7 | 1997 | -63% | 1970 | |
| Purple Martin | Hirundinidae | 7 | 1997 | -60% | 1970 | |
| Cliff Swallow | Hirundinidae | 7 | 1997 | -43% | 1990 | |
| Black Vulture | Cathartidae | 6 | 1997 | +83% | 1971 | |
| Killdeer | Charadriidae | 4 | 1997 | -76% | 1971 | |
| Downy Woodpecker | Picidae | 4 | 1997 | -17% | 1971 | |
| American Robin | Turdidae | 4 | 1997 | +300% | 1979 | |
| Western Meadowlark | Icteridae | 4 | 1977 | +100% | 1971 | |
| Western Kingbird | Tyrannidae | 4 | 1997 | +43% | 1992 | |
| Rock Pigeon | Columbidae | 3 | 1997 | +138% | 1977 | |
| Red-bellied Woodpecker | Picidae | 3 | 1997 | +325% | 1971 | |
| Lark Sparrow | Passerellidae | 3 | 1997 | -64% | 1970 | |
| Western Cattle-Egret | Ardeidae | 3 | 1997 | +187% | 1977 | |
| Great Blue Heron | Ardeidae | 3 | 1997 | +167% | 1983 | |
| Great Crested Flycatcher | Tyrannidae | 2 | 1996 | -19% | 1971 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.