BBS Route · Texas · BCR 21
Gambill Ref. Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 88 species recorded across 12 survey years, still active.
88Species Recorded
12Years Surveyed
1995–2024Span
5Observers
Bird Species Found on Texas Gambill Ref.
Top 40 of 88 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Dickcissel | Cardinalidae | 60 | 2024 | -35% | 2012 | |
| American Crow | Corvidae | 55 | 2024 | -8% | 2012 | |
| Barn Swallow | Hirundinidae | 47 | 2024 | -25% | 2012 | |
| Northern Cardinal | Cardinalidae | 41 | 2024 | -33% | 2012 | |
| Eastern Meadowlark | Icteridae | 35 | 2024 | -50% | 2012 | |
| Northern Mockingbird | Mimidae | 31 | 2024 | -48% | 2012 | |
| Red-winged Blackbird | Icteridae | 26 | 2024 | -27% | 2012 | |
| Carolina Wren | Troglodytidae | 19 | 2024 | +44% | 2012 | |
| Cliff Swallow | Hirundinidae | 19 | 2024 | 12× | 2016 | |
| Mourning Dove | Columbidae | 18 | 2024 | -24% | 2012 | |
| Indigo Bunting | Cardinalidae | 18 | 2024 | +100% | 2012 | |
| Scissor-tailed Flycatcher | Tyrannidae | 16 | 2024 | -19% | 2012 | |
| Great-tailed Grackle | Icteridae | 15 | 1995 | n/a | n/a | |
| House Sparrow | Passeridae | 15 | 2024 | -57% | 2012 | |
| Eastern Phoebe | Tyrannidae | 12 | 2024 | +136% | 2012 | |
| Painted Bunting | Cardinalidae | 12 | 2024 | -13% | 2012 | |
| Tufted Titmouse | Paridae | 11 | 2024 | -3% | 2012 | |
| Northern Rough-winged Swallow | Hirundinidae | 10 | 2019 | +900% | 2015 | |
| Yellow-billed Cuckoo | Cuculidae | 9 | 2024 | -25% | 2012 | |
| Purple Martin | Hirundinidae | 8 | 2024 | -35% | 2012 | |
| Canada Goose | Anatidae | 8 | 2014 | +167% | 2009 | |
| Blue Jay | Corvidae | 7 | 2024 | -49% | 2012 | |
| White-eyed Vireo | Vireonidae | 7 | 2024 | +15% | 2012 | |
| American Robin | Turdidae | 7 | 2024 | -43% | 2009 | |
| Western Cattle-Egret | Ardeidae | 6 | 2023 | +191% | 2009 | |
| Turkey Vulture | Cathartidae | 6 | 2024 | +7% | 2012 | |
| Red-bellied Woodpecker | Picidae | 6 | 2024 | -50% | 2012 | |
| Brown-headed Cowbird | Icteridae | 6 | 2024 | -74% | 2012 | |
| Red-eyed Vireo | Vireonidae | 6 | 2024 | +140% | 2012 | |
| Carolina Chickadee | Paridae | 6 | 2024 | -41% | 2012 | |
| Eastern Bluebird | Turdidae | 6 | 2024 | -52% | 2012 | |
| Eurasian Collared-Dove | Columbidae | 6 | 2024 | +57% | 2014 | |
| Blue-gray Gnatcatcher | Polioptilidae | 5 | 2024 | -29% | 2012 | |
| Horned Lark | Alaudidae | 5 | 2021 | +10% | 2016 | |
| Wood Duck | Anatidae | 4 | 2023 | +100% | 1995 | |
| Chimney Swift | Apodidae | 4 | 2017 | -55% | 2012 | |
| Eastern Kingbird | Tyrannidae | 4 | 2024 | -66% | 2012 | |
| Red-shouldered Hawk | Accipitridae | 4 | 2024 | +50% | 2017 | |
| Northern Bobwhite | Odontophoridae | 3 | 2024 | -89% | 2009 | |
| Fish Crow | Corvidae | 3 | 2024 | -56% | 2012 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.