BBS Route · Texas · BCR 36
Dilley Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 67 species recorded across 6 survey years, still active.
67Species Recorded
6Years Surveyed
2018–2024Span
2Observers
Bird Species Found on Texas Dilley
Top 40 of 67 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Mourning Dove | Columbidae | 109 | 2024 | +138% | 2021 | |
| Northern Mockingbird | Mimidae | 73 | 2024 | +9% | 2021 | |
| Northern Bobwhite | Odontophoridae | 47 | 2024 | +82% | 2019 | |
| Northern Cardinal | Cardinalidae | 47 | 2024 | -24% | 2021 | |
| Scissor-tailed Flycatcher | Tyrannidae | 40 | 2024 | +32% | 2021 | |
| Golden-fronted Woodpecker | Picidae | 30 | 2024 | +15% | 2021 | |
| Painted Bunting | Cardinalidae | 27 | 2024 | -29% | 2021 | |
| Black Vulture | Cathartidae | 24 | 2024 | +196% | 2021 | |
| Great-tailed Grackle | Icteridae | 19 | 2024 | +567% | 2021 | |
| Pyrrhuloxia | Cardinalidae | 18 | 2024 | +317% | 2021 | |
| Brown-headed Cowbird | Icteridae | 15 | 2024 | -4% | 2021 | |
| Bullock's Oriole | Icteridae | 15 | 2024 | +177% | 2021 | |
| European Starling | Sturnidae | 14 | 2024 | +21% | 2021 | |
| Bewick's Wren | Troglodytidae | 13 | 2024 | +159% | 2021 | |
| Cactus Wren | Troglodytidae | 11 | 2024 | +267% | 2022 | |
| Red-winged Blackbird | Icteridae | 10 | 2024 | -34% | 2021 | |
| Harris's Hawk | Accipitridae | 8 | 2024 | +33% | 2019 | |
| Olive Sparrow | Passerellidae | 8 | 2024 | -43% | 2021 | |
| Brown-crested Flycatcher | Tyrannidae | 8 | 2024 | +300% | 2022 | |
| Cassin's Sparrow | Passerellidae | 7 | 2024 | -31% | 2021 | |
| Bell's Vireo | Vireonidae | 6 | 2024 | +33% | 2022 | |
| Common Ground Dove | Columbidae | 6 | 2024 | +0% | 2022 | |
| Lark Sparrow | Passerellidae | 6 | 2024 | +200% | 2023 | |
| Black-bellied Whistling-Duck | Anatidae | 5 | 2023 | +250% | 2019 | |
| Crested Caracara | Falconidae | 4 | 2024 | -9% | 2021 | |
| Western Cattle-Egret | Ardeidae | 4 | 2021 | n/a | n/a | |
| Scaled Quail | Odontophoridae | 4 | 2024 | n/a | n/a | |
| Ladder-backed Woodpecker | Picidae | 3 | 2024 | +200% | 2018 | |
| Couch's Kingbird | Tyrannidae | 3 | 2024 | -43% | 2019 | |
| Purple Martin | Hirundinidae | 3 | 2018 | n/a | n/a | |
| Barn Swallow | Hirundinidae | 3 | 2024 | +750% | 2019 | |
| Black-crested Titmouse | Paridae | 3 | 2024 | -33% | 2019 | |
| Eurasian Collared-Dove | Columbidae | 3 | 2024 | -20% | 2019 | |
| Curve-billed Thrasher | Mimidae | 3 | 2023 | +50% | 2019 | |
| Red-tailed Hawk | Accipitridae | 2 | 2024 | +100% | 2018 | |
| Greater Roadrunner | Cuculidae | 2 | 2024 | -43% | 2019 | |
| House Sparrow | Passeridae | 2 | 2024 | +40% | 2021 | |
| Yellow-billed Cuckoo | Cuculidae | 2 | 2024 | +50% | 2021 | |
| Dickcissel | Cardinalidae | 2 | 2024 | -50% | 2021 | |
| Hooded Oriole | Icteridae | 2 | 2023 | +100% | 2022 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.