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 Recorded
9Years Surveyed
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.
| History | ||||||
|---|---|---|---|---|---|---|
| European Starling | Sturnidae | 210 | 2019 | +3% | 2013 | |
| Red-winged Blackbird | Icteridae | 165 | 2019 | +53% | 2013 | |
| Seaside Sparrow | Passerellidae | 117 | 2019 | +21% | 2013 | |
| Laughing Gull | Laridae | 74 | 2019 | -39% | 2013 | |
| Great Egret | Ardeidae | 27 | 2019 | -42% | 2013 | |
| Western Cattle-Egret | Ardeidae | 26 | 2011 | -13% | 2010 | |
| Barn Swallow | Hirundinidae | 24 | 2019 | +41% | 2013 | |
| Brown Pelican | Pelecanidae | 16 | 2019 | -27% | 2013 | |
| White Ibis | Threskiornithidae | 15 | 2018 | -81% | 2013 | |
| Purple Martin | Hirundinidae | 14 | 2019 | -36% | 2013 | |
| Northern Mockingbird | Mimidae | 13 | 2019 | -3% | 2013 | |
| Brown-headed Cowbird | Icteridae | 12 | 2019 | +150% | 2013 | |
| Least Tern | Laridae | 11 | 2019 | +18% | 2013 | |
| Common Nighthawk | Caprimulgidae | 11 | 2019 | -12% | 2013 | |
| Clapper Rail | Rallidae | 10 | 2019 | -27% | 2013 | |
| Killdeer | Charadriidae | 10 | 2019 | +75% | 2013 | |
| Forster's Tern | Laridae | 9 | 2018 | -15% | 2013 | |
| Common Yellowthroat | Parulidae | 8 | 2019 | +833% | 2013 | |
| Mottled Duck | Anatidae | 7 | 2018 | -67% | 2013 | |
| Orchard Oriole | Icteridae | 7 | 2019 | +35% | 2013 | |
| Loggerhead Shrike | Laniidae | 6 | 2019 | +13% | 2013 | |
| Green Heron | Ardeidae | 5 | 2019 | -30% | 2015 | |
| Black-necked Stilt | Recurvirostridae | 5 | 2018 | +50% | 2011 | |
| Caspian Tern | Laridae | 4 | 2018 | +63% | 2014 | |
| Great Blue Heron | Ardeidae | 4 | 2019 | -50% | 2013 | |
| Eastern Kingbird | Tyrannidae | 4 | 2018 | -30% | 2014 | |
| House Sparrow | Passeridae | 4 | 2018 | -31% | 2013 | |
| Eurasian Collared-Dove | Columbidae | 4 | 2019 | +29% | 2013 | |
| Royal Tern | Laridae | 3 | 2019 | -53% | 2013 | |
| Willet | Scolopacidae | 3 | 2019 | -36% | 2013 | |
| Common Grackle | Icteridae | 3 | 2019 | -39% | 2013 | |
| Boat-tailed Grackle | Icteridae | 3 | 2019 | -47% | 2013 | |
| Painted Bunting | Cardinalidae | 3 | 2011 | n/a | n/a | |
| Eastern Meadowlark | Icteridae | 3 | 2018 | +33% | 2015 | |
| Ring-billed Gull | Laridae | 3 | 2017 | n/a | n/a | |
| Gull-billed Tern | Laridae | 2 | 2014 | -67% | 2010 | |
| Mourning Dove | Columbidae | 2 | 2019 | -40% | 2016 | |
| Least Bittern | Ardeidae | 2 | 2019 | +67% | 2016 | |
| Yellow-crowned Night Heron | Ardeidae | 2 | 2014 | n/a | n/a | |
| Black-crowned Night Heron | Ardeidae | 2 | 2018 | -50% | 2017 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.