Birds of North Carolina:
their Distribution and Abundance
Least Tern - Sternula antillarum
LARIDAE Members:
Search Common:                 Search Scientific:
General Comments The smallest tern in North America, the Least Tern is a familiar yet slowly declining breeding species in coastal areas, as well as along the Mississippi and other large inland rivers. It is no wonder that numbers are declining, as it breeds on bare sand on ocean beaches, island end flats, and on sandy islands, where the nests (of all terns) are susceptible to loss from bad weather, predators, and humans/ATVs. In the past few years there has been an upward trend in breeding numbers in the state, perhaps owing to more vigilant posting and protecting of breeding colonies. In North Carolina, the species forages over the inshore ocean and in sounds/estuaries, rarely at fresh or brackish water. Least Terns are rarely found inland in the state, usually only during or after storms; there are no mountain records. They also depart the state fairly early in fall, with only a few late fall records; there are no documented winter records for the state, though there are a handful of published reports.
Breeding Status Breeder
NC BRC List Definitive
State Status SC
U.S. Status
State Rank S3B
Global Rank G4
Coastal Plain Breeding summer resident along the coast; declining until a few years ago, but recently has increased. Generally fairly common to common north to Oregon Inlet, but uncommon to fairly common northward. Somewhat less numerous in the Tidewater zone (around brackish water, mainly). Very rare to rare non-breeder farther inland, where it is mostly a post-breeding visitor or early fall migrant (including some storm-carried records). Along the coast, mainly present from early Apr to mid-Sep; departs early, with very few remaining into Oct; exceptionally from mid-Mar to mid-Nov, but no conclusive winter records (Dec thru Feb). Farther inland, records are mainly from early Jun to early Sep. Peak counts: 680, Masonboro Inlet (New Hanover), 4 Jul 2015; 320, rooftop nesting area at Emerald Isle, summer 2003; ?
Piedmont Storm-carried visitor. Casual at reservoirs during and after hurricanes; about eight records, from lakes in the Triangle area and at Shelby. All but two of these records fall between 27 Aug to 10 Oct, with most records from Hurricane Fran on 6-7 Sep 1996. The only non-storm related reports are of two birds at Lake Crabtree (Wake), 15 Jun 2011; and one at that lake on 25 May 2015, presumably not carried there by Tropical Storm Ana over two weeks earlier. Peak counts: 11, Falls Lake, 28 Aug 2011 (after Hurricane Irene); 8, Lake Crabtree, 27 Aug 2011 (after Hurricane Irene); 6, Shelby, 22 Sep 1989 (after Hurricane Hugo); 6 each at Jordan and Falls lakes, 6-7 Sep 1996.
Mountains No records.
Finding Tips This species is not usually missed on coastal birding trips from May through Aug, though it isn't quite a gimme. The birds have clearly declined in North Carolina in the past 30 years, though Leasts are persistent nesters (i.e., will keep trying to nest after storms or other disturbances knock out earlier attempts) and are still relatively numerous in the state. This is one of the few terns that is as easily seen on the southern beaches, such as in Brunswick, as it is along the northern coast.
***
Attribution LeGrand[2015-12-31], LeGrand[2015-12-24], LeGrand[2013-12-10]
NC Map
Map depicts all counties with a report (transient or resident) for the species.
Click on county for list of all known species.
NC Breeding Season Map
Map depicts assumed breeding season abundance for the species.
NA Maps
(source NatureServe)

View NatureServe distribution maps for Sternula antillarum