BBS Route · Texas · BCR 35
Delaware Crk Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 62 species recorded across 24 survey years, still active.
62Species Recorded
24Years Surveyed
1971–2015Span
5Observers
Bird Species Found on Texas Delaware Crk
Top 40 of 62 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Northern Mockingbird | Mimidae | 70 | 2015 | -28% | 1973 | |
| Cliff Swallow | Hirundinidae | 67 | 2015 | -88% | 1973 | |
| Black-throated Sparrow | Passerellidae | 57 | 2015 | -31% | 1973 | |
| Mourning Dove | Columbidae | 56 | 2015 | +90% | 1973 | |
| Cassin's Sparrow | Passerellidae | 34 | 2015 | -45% | 1974 | |
| Scaled Quail | Odontophoridae | 22 | 2015 | -78% | 1973 | |
| House Finch | Fringillidae | 19 | 2015 | +200% | 1973 | |
| Western Kingbird | Tyrannidae | 18 | 2015 | +50% | 1973 | |
| Cave Swallow | Hirundinidae | 17 | 2009 | n/a | n/a | |
| Ash-throated Flycatcher | Tyrannidae | 15 | 2015 | +0% | 1973 | |
| Blue Grosbeak | Cardinalidae | 14 | 2015 | +77% | 1974 | |
| Scott's Oriole | Icteridae | 11 | 2015 | +24% | 1974 | |
| Western Meadowlark | Icteridae | 10 | 1988 | -21% | 1982 | |
| Turkey Vulture | Cathartidae | 8 | 2015 | +141% | 1973 | |
| Cassin's Kingbird | Tyrannidae | 8 | 2014 | +36% | 1976 | |
| Common Nighthawk | Caprimulgidae | 7 | 2015 | -39% | 1973 | |
| Cactus Wren | Troglodytidae | 6 | 2015 | -86% | 1973 | |
| Brown-headed Cowbird | Icteridae | 6 | 2015 | +56% | 1975 | |
| Horned Lark | Alaudidae | 6 | 2015 | +100% | 1986 | |
| Loggerhead Shrike | Laniidae | 5 | 2015 | -46% | 1973 | |
| Verdin | Remizidae | 5 | 2015 | +125% | 1973 | |
| Greater Roadrunner | Cuculidae | 5 | 2015 | +33% | 1974 | |
| Rock Pigeon | Columbidae | 4 | 1980 | n/a | n/a | |
| Say's Phoebe | Tyrannidae | 3 | 2015 | -13% | 1974 | |
| Pyrrhuloxia | Cardinalidae | 3 | 2014 | +13% | 1973 | |
| Bewick's Wren | Troglodytidae | 3 | 2014 | +0% | 1981 | |
| Bell's Vireo | Vireonidae | 3 | 2015 | +0% | 1987 | |
| Ferruginous Hawk | Accipitridae | 2 | 1971 | n/a | n/a | |
| White-throated Swift | Apodidae | 2 | 1971 | n/a | n/a | |
| Painted Bunting | Cardinalidae | 2 | 2014 | +125% | 1974 | |
| Chihuahuan Meadowlark | Icteridae | 2 | 1987 | -18% | 1977 | |
| Orchard Oriole | Icteridae | 2 | 2014 | +33% | 1982 | |
| Swainson's Hawk | Accipitridae | 2 | 2015 | -29% | 1987 | |
| Great-tailed Grackle | Icteridae | 2 | 2009 | +100% | 1986 | |
| White-winged Dove | Columbidae | 2 | 2011 | n/a | n/a | |
| Red-tailed Hawk | Accipitridae | 1 | 2014 | +0% | 1974 | |
| Scissor-tailed Flycatcher | Tyrannidae | 1 | 1972 | -50% | 1971 | |
| Bullock's Oriole | Icteridae | 1 | 2015 | +20% | 1974 | |
| Curve-billed Thrasher | Mimidae | 1 | 2015 | +0% | 1973 | |
| Great Horned Owl | Strigidae | 1 | 2009 | +100% | 1981 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.