BirdAnalyst
BBS Route · Louisiana · BCR 25

Mer Rouge Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 96 species recorded across 34 survey years, no longer active.

96Species 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 →
34Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–2008Span
3Observers

Bird Species Found on Louisiana Mer Rouge

Top 40 of 96 species by most recent count. Each links to its species trend.

Species recorded on the Mer Rouge 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
Red-winged BlackbirdIcteridae2032008+63%1970
American CrowCorvidae532008+361%1970
Northern CardinalCardinalidae442008-15%1970
Mourning DoveColumbidae382008-6%1970
Western Cattle-EgretArdeidae342008+21%1971
Cliff SwallowHirundinidae252008+46%2004
White-eyed VireoVireonidae212008+250%1970
Common GrackleIcteridae192008-86%1970
Carolina ChickadeeParidae192008-6%1970
Indigo BuntingCardinalidae182008+203%1970
DickcisselCardinalidae182008-6%1970
Yellow-breasted ChatIcteriidae182008+77%1970
European StarlingSturnidae172008-65%1970
Carolina WrenTroglodytidae172008+460%1970
Northern MockingbirdMimidae132008-21%1970
Common YellowthroatParulidae112008+47%1970
Bachman's SparrowPasserellidae112006+160%1972
Barn SwallowHirundinidae112008+121%1975
Eastern MeadowlarkIcteridae102008-86%1970
Eastern BluebirdTurdidae102008+267%1995
Yellow-billed CuckooCuculidae92008-37%1970
Blue JayCorvidae92008-42%1970
Tufted TitmouseParidae92008-21%1970
Brown-headed CowbirdIcteridae82008-45%1970
Summer TanagerCardinalidae82008+127%1970
Purple MartinHirundinidae62008+286%1970
Blue-gray GnatcatcherPolioptilidae62008+89%1971
Turkey VultureCathartidae62008+0%1993
KilldeerCharadriidae52008+233%1977
Great Crested FlycatcherTyrannidae52008-9%1970
Loggerhead ShrikeLaniidae52008+22%1972
Northern Rough-winged SwallowHirundinidae51984+400%1982
Northern ParulaParulidae52008+100%1999
Yellow-crowned Night HeronArdeidae41985+83%1970
Red-bellied WoodpeckerPicidae42008-10%1970
Orchard OrioleIcteridae42008-7%1970
Pine WarblerParulidae42008+18%1971
Mississippi KiteAccipitridae42008+0%2005
Horned LarkAlaudidae42007+240%1973
Rock PigeonColumbidae32003+214%1970

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