BirdAnalyst
BBS Route · Louisiana · BCR 37

Grand Isle Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 60 species recorded across 9 survey years, still active.

60Species 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 →
9Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2010–2019Span
3Observers

Bird Species Found on Louisiana Grand Isle

Top 40 of 60 species by most recent count. Each links to its species trend.

Species recorded on the Grand Isle 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
European StarlingSturnidae2102019+3%2013
Red-winged BlackbirdIcteridae1652019+53%2013
Seaside SparrowPasserellidae1172019+21%2013
Laughing GullLaridae742019-39%2013
Great EgretArdeidae272019-42%2013
Western Cattle-EgretArdeidae262011-13%2010
Barn SwallowHirundinidae242019+41%2013
Brown PelicanPelecanidae162019-27%2013
White IbisThreskiornithidae152018-81%2013
Purple MartinHirundinidae142019-36%2013
Northern MockingbirdMimidae132019-3%2013
Brown-headed CowbirdIcteridae122019+150%2013
Least TernLaridae112019+18%2013
Common NighthawkCaprimulgidae112019-12%2013
Clapper RailRallidae102019-27%2013
KilldeerCharadriidae102019+75%2013
Forster's TernLaridae92018-15%2013
Common YellowthroatParulidae82019+833%2013
Mottled DuckAnatidae72018-67%2013
Orchard OrioleIcteridae72019+35%2013
Loggerhead ShrikeLaniidae62019+13%2013
Green HeronArdeidae52019-30%2015
Black-necked StiltRecurvirostridae52018+50%2011
Caspian TernLaridae42018+63%2014
Great Blue HeronArdeidae42019-50%2013
Eastern KingbirdTyrannidae42018-30%2014
House SparrowPasseridae42018-31%2013
Eurasian Collared-DoveColumbidae42019+29%2013
Royal TernLaridae32019-53%2013
WilletScolopacidae32019-36%2013
Common GrackleIcteridae32019-39%2013
Boat-tailed GrackleIcteridae32019-47%2013
Painted BuntingCardinalidae32011n/an/a
Eastern MeadowlarkIcteridae32018+33%2015
Ring-billed GullLaridae32017n/an/a
Gull-billed TernLaridae22014-67%2010
Mourning DoveColumbidae22019-40%2016
Least BitternArdeidae22019+67%2016
Yellow-crowned Night HeronArdeidae22014n/an/a
Black-crowned Night HeronArdeidae22018-50%2017

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