BBS Route · Texas · BCR 19
Mertzon Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 86 species recorded across 37 survey years, no longer active.
86Species Recorded
37Years Surveyed
1967–2019Span
7Observers
Bird Species Found on Texas Mertzon
Top 40 of 86 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Ash-throated Flycatcher | Tyrannidae | 28 | 2019 | +525% | 1969 | |
| Turkey Vulture | Cathartidae | 27 | 2019 | +76% | 1969 | |
| Cassin's Sparrow | Passerellidae | 21 | 2019 | -84% | 1969 | |
| Painted Bunting | Cardinalidae | 20 | 2019 | +20% | 1969 | |
| Bell's Vireo | Vireonidae | 20 | 2019 | 12× | 1969 | |
| Brown-headed Cowbird | Icteridae | 18 | 2019 | -39% | 1969 | |
| Northern Cardinal | Cardinalidae | 18 | 2019 | -11% | 1969 | |
| Cliff Swallow | Hirundinidae | 15 | 2016 | +39% | 2012 | |
| Northern Mockingbird | Mimidae | 14 | 2019 | -66% | 1969 | |
| Lark Sparrow | Passerellidae | 13 | 2019 | -71% | 1969 | |
| Cave Swallow | Hirundinidae | 13 | 2019 | +10% | 1994 | |
| Bewick's Wren | Troglodytidae | 11 | 2019 | -71% | 1969 | |
| Western Meadowlark | Icteridae | 10 | 2002 | -43% | 1971 | |
| Black-throated Sparrow | Passerellidae | 9 | 2019 | -68% | 1969 | |
| Blue Grosbeak | Cardinalidae | 9 | 2018 | +100% | 1969 | |
| Great Blue Heron | Ardeidae | 8 | 2012 | +233% | 1979 | |
| House Sparrow | Passeridae | 7 | 2019 | +8% | 1971 | |
| Mourning Dove | Columbidae | 6 | 2019 | -81% | 1969 | |
| Orchard Oriole | Icteridae | 6 | 2019 | +14% | 1969 | |
| Golden-fronted Woodpecker | Picidae | 4 | 2019 | -73% | 1969 | |
| Grasshopper Sparrow | Passerellidae | 4 | 2015 | +0% | 1974 | |
| Chipping Sparrow | Passerellidae | 4 | 2010 | +0% | 2007 | |
| Killdeer | Charadriidae | 3 | 2007 | -61% | 1969 | |
| Northern Bobwhite | Odontophoridae | 3 | 2019 | -40% | 1969 | |
| Scissor-tailed Flycatcher | Tyrannidae | 3 | 2019 | -25% | 1969 | |
| Common Raven | Corvidae | 3 | 2011 | -29% | 1969 | |
| Lesser Goldfinch | Fringillidae | 3 | 2011 | +60% | 1969 | |
| Pyrrhuloxia | Cardinalidae | 3 | 2019 | +36% | 1972 | |
| Barn Swallow | Hirundinidae | 3 | 2019 | +70% | 1974 | |
| Carolina Chickadee | Paridae | 3 | 2002 | +50% | 1979 | |
| White-winged Dove | Columbidae | 3 | 2019 | +33% | 2013 | |
| Scaled Quail | Odontophoridae | 2 | 2019 | -84% | 1969 | |
| Wild Turkey | Phasianidae | 2 | 2006 | +400% | 1969 | |
| Horned Lark | Alaudidae | 2 | 2016 | -82% | 1969 | |
| Rufous-crowned Sparrow | Passerellidae | 2 | 2010 | +0% | 1972 | |
| Canyon Towhee | Passerellidae | 2 | 2019 | +14% | 1969 | |
| Rock Pigeon | Columbidae | 2 | 2002 | +0% | 1968 | |
| Swainson's Hawk | Accipitridae | 2 | 2015 | -50% | 1972 | |
| Verdin | Remizidae | 2 | 2013 | +25% | 1972 | |
| Blue-gray Gnatcatcher | Polioptilidae | 2 | 2017 | +0% | 1986 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.