BirdAnalyst
BBS Route · Louisiana · BCR 25

Derry Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 94 species recorded across 19 survey years, no longer active.

94Species 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 →
19Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–1989Span
3Observers

Bird Species Found on Louisiana Derry

Top 40 of 94 species by most recent count. Each links to its species trend.

Species recorded on the Derry 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
Western Cattle-EgretArdeidae287198928×1970
American CrowCorvidae1101989+134%1969
Northern CardinalCardinalidae921989+133%1969
Northern MockingbirdMimidae461989+7%1969
Carolina WrenTroglodytidae451989+283%1969
Barn SwallowHirundinidae44198911×1973
Purple MartinHirundinidae301989-31%1969
White IbisThreskiornithidae29198929×1987
Red-winged BlackbirdIcteridae281989-62%1969
Yellow-breasted ChatIcteriidae271989+462%1969
Blue JayCorvidae251989+7%1969
Eastern MeadowlarkIcteridae251989-35%1969
White-eyed VireoVireonidae251989+140%1971
Rock PigeonColumbidae241977-53%1967
Pine WarblerParulidae211989-20%1969
Little Blue HeronArdeidae191989+12%1969
Brown-headed CowbirdIcteridae191989+0%1969
Carolina ChickadeeParidae191989+14%1969
Northern BobwhiteOdontophoridae181989-8%1969
Indigo BuntingCardinalidae181989+389%1970
Mourning DoveColumbidae171989-39%1969
Red-bellied WoodpeckerPicidae171989+178%1969
Red-eyed VireoVireonidae161989+112%1971
Eastern BluebirdTurdidae161989+286%1972
Summer TanagerCardinalidae151989+29%1969
Tufted TitmouseParidae151989+63%1969
Turkey VultureCathartidae141982+110%1971
Common YellowthroatParulidae141989+76%1969
Chipping SparrowPasserellidae141989+16%1972
Yellow-billed CuckooCuculidae111989+25%1969
Great EgretArdeidae101989-15%1974
Great Crested FlycatcherTyrannidae101989+72%1971
Brown ThrasherMimidae81989+400%1969
Field SparrowPasserellidae71989+29%1972
Blue GrosbeakCardinalidae71989+360%1975
Painted BuntingCardinalidae71989+144%1972
Eastern Wood-PeweeTyrannidae61989+150%1969
DickcisselCardinalidae61989+107%1970
Hooded WarblerParulidae61989+77%1971
KilldeerCharadriidae51988+0%1971

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