BBS Route · Colorado · BCR 16
Flattops Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 102 species recorded across 28 survey years, still active.
102Species Recorded
28Years Surveyed
1992–2019Span
3Observers
Bird Species Found on Colorado Flattops
Top 40 of 102 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| American Robin | Turdidae | 44 | 2019 | -29% | 1994 | |
| Warbling Vireo | Vireonidae | 31 | 2019 | -59% | 1994 | |
| Northern House Wren | Troglodytidae | 23 | 2019 | +127% | 1994 | |
| Ruby-crowned Kinglet | Regulidae | 22 | 2019 | +14% | 1994 | |
| Clark's Nutcracker | Corvidae | 15 | 2017 | +86% | 1996 | |
| American Crow | Corvidae | 14 | 2019 | +540% | 1996 | |
| Western Wood-Pewee | Tyrannidae | 12 | 2019 | +17% | 1994 | |
| Black-billed Magpie | Corvidae | 12 | 2019 | +82% | 1996 | |
| Red Crossbill | Fringillidae | 12 | 2014 | -5% | 2002 | |
| White-crowned Sparrow | Passerellidae | 12 | 2019 | -36% | 1995 | |
| Lincoln's Sparrow | Passerellidae | 11 | 2019 | +114% | 1995 | |
| Violet-green Swallow | Hirundinidae | 11 | 2019 | +100% | 1994 | |
| Chipping Sparrow | Passerellidae | 10 | 2019 | +5% | 1994 | |
| Hermit Thrush | Turdidae | 10 | 2019 | -74% | 1994 | |
| Evening Grosbeak | Fringillidae | 8 | 2017 | n/a | n/a | |
| Western Tanager | Cardinalidae | 7 | 2019 | -67% | 1994 | |
| American Goldfinch | Fringillidae | 7 | 2006 | +8% | 2004 | |
| Broad-tailed Hummingbird | Trochilidae | 6 | 2019 | -29% | 1994 | |
| Spotted Towhee | Passerellidae | 6 | 2019 | +125% | 1995 | |
| House Finch | Fringillidae | 6 | 2010 | +50% | 2004 | |
| Williamson's Sapsucker | Picidae | 5 | 2016 | +133% | 2002 | |
| Pine Siskin | Fringillidae | 4 | 2019 | -73% | 1994 | |
| Mountain Chickadee | Paridae | 4 | 2019 | +213% | 1995 | |
| Bullock's Oriole | Icteridae | 4 | 2014 | +80% | 2000 | |
| Cliff Swallow | Hirundinidae | 4 | 2003 | +100% | 2000 | |
| Swainson's Hawk | Accipitridae | 3 | 2019 | -17% | 2005 | |
| Red-naped Sapsucker | Picidae | 3 | 2019 | +40% | 1994 | |
| Black-headed Grosbeak | Cardinalidae | 3 | 2019 | +17% | 1996 | |
| Tree Swallow | Hirundinidae | 3 | 2019 | +124% | 1994 | |
| Pine Grosbeak | Fringillidae | 3 | 2015 | +29% | 1996 | |
| Purple Martin | Hirundinidae | 3 | 2018 | +0% | 1998 | |
| Wild Turkey | Phasianidae | 3 | 2019 | +150% | 2004 | |
| Vesper Sparrow | Passerellidae | 3 | 2016 | n/a | n/a | |
| Downy Woodpecker | Picidae | 2 | 2015 | +33% | 2002 | |
| Common Nighthawk | Caprimulgidae | 2 | 2006 | -50% | 1994 | |
| Canada Jay | Corvidae | 2 | 2019 | +17% | 1994 | |
| Virginia's Warbler | Parulidae | 2 | 2018 | +0% | 2004 | |
| Orange-crowned Warbler | Parulidae | 2 | 2019 | +0% | 1995 | |
| Swainson's Thrush | Turdidae | 2 | 2019 | -55% | 1994 | |
| Mountain Bluebird | Turdidae | 2 | 2019 | -17% | 1995 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.