BirdAnalyst
BBS Route · New Mexico · BCR 18

Grenville Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 90 species recorded across 53 survey years, still active.

90Species RecordedSpecies recordedDistinct species detected on standard-protocol BBS runs here across all years on record — a measure of survey breadth, not a complete checklist.Full methodology →
53Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2024Span
3Observers

Bird Species Found on New Mexico Grenville

Top 40 of 90 species by most recent count. Each links to its species trend.

Species recorded on the Grenville route.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
Horned LarkAlaudidae1542024-8%1970
Western MeadowlarkIcteridae1312024-42%1970
Cassin's SparrowPasserellidae762024+32%1970
Northern MockingbirdMimidae232024-6%1970
Cliff SwallowHirundinidae222024-9%1970
Western KingbirdTyrannidae212024-15%1973
Lark SparrowPasserellidae172024+66%1970
Northern PintailAnatidae161985+19%1978
Northern ShovelerAnatidae131979+225%1977
Common RavenCorvidae9202412×1973
Blue-winged TealAnatidae81985+0%1977
Green-winged TealAnatidae82003+24%1985
Ruddy DuckAnatidae81978n/an/a
Mourning DoveColumbidae72024-46%1970
Barn SwallowHirundinidae72024+29%1970
GadwallAnatidae61979+500%1977
Great-tailed GrackleIcteridae62024-52%2012
Common NighthawkCaprimulgidae52024-80%1970
Blue GrosbeakCardinalidae52024+280%1973
Eared GrebePodicipedidae51978+150%1977
Chihuahuan RavenCorvidae52024-80%1979
Northern Rough-winged SwallowHirundinidae52024+200%2006
House SparrowPasseridae42024-72%1970
RedheadAnatidae41978-69%1977
Cinnamon TealAnatidae41979+300%1978
Curve-billed ThrasherMimidae42021+100%1986
Swainson's HawkAccipitridae32024+200%1970
Cassin's KingbirdTyrannidae32024-33%1970
Bullock's OrioleIcteridae32024+0%1970
Grasshopper SparrowPasserellidae32024+133%1974
Rufous-crowned SparrowPasserellidae32024+50%1970
Turkey VultureCathartidae32019+20%1973
American CootRallidae31979+200%1977
Lesser GoldfinchFringillidae32019+50%1997
DickcisselCardinalidae32017+200%2005
Mountain PloverCharadriidae22021-50%1971
Scaled QuailOdontophoridae22024-42%1970
Canyon TowheePasserellidae22021+20%1970
Loggerhead ShrikeLaniidae22024-77%1970
Brown-headed CowbirdIcteridae22024+33%1971

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.