Birds of North Carolina:
their Distribution and Abundance
Gull-billed Tern - Gelochelidon nilotica
LARIDAE Members:
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General Comments Of all of the breeding species in North Carolina, few are as strongly declining over the past decade as the Gull-billed Tern. Why this species is declining more severely than the other ground-nesting colonial waterbirds (such as Least, Common, Royal, and Sandwich terns, and Black Skimmers) is not certain. Gull-billed has always been one of the least common of the breeding terns in the state, but now (2007 data) less than 100 pairs are breeding, as compared with xxx pairs in 1977, when colonial waterbird censuses were begun. Unlike other coastal terns, this species feeds over coastal grasslands, dunes, and marshes, where it plucks prey such as lizards and grasshoppers from vegetation; it does not feed at water. However, along the coast, they do rest on sandbars and spits with other terns. This species is almost strictly coastal, and any report of one far inland is typically met with skepticism. In addition to being almost strictly coastal, it is quite an early fall migrant, and late fall reports, much less those in the winter, are also met with raised eyebrows, as well.
Breeding Status Breeder
NC BRC List Definitive
State Status T
U.S. Status
State Rank S1S2B
Global Rank G5
Coastal Plain Breeding summer resident, along and near the coast. Uncommon to fairly common -- fairly common prior to 2000 -- but strongly declining along the southern half of the coast, north to Carteret; and generally uncommon (since 2000) northward along the coast. Rare to uncommon in the Tidewater zone, though it does occur in freshwater areas such as Lake Mattamuskeet and Lake Phelps on occasions, and there are a few records as far inland as Aurora (Beaufort); nests sporadically on islands along the mainland side of Pamlico Sound. Nests on both small coastal islands and on barrier islands. Only one far inland record: an adult at Buckhorn Reservoir (Wilson), on 11 May 2015 [Chat 79:134 link], after the passage of Tropical Storm Ana a few days earlier. Normally present from early Apr to mid-Sep, rarely to early Oct. No valid/documented records in Nov, Dec, Jan, and Feb, though there are a handful of such published reports. Peak counts: 160 (post-breeding), Davis (Carteret), 19 Aug 2012; 110 (post-breeding), Davis (Carteret), 28 Jul 2002; 85 (post-breeding), North River Farms (Carteret), 8 Aug 2004.
Piedmont Accidental/casual, presumably a storm-carried visitor, but whether these reports were actually related to storms is not mentioned in the literature. Records are of 3 near Raleigh on 4 Sep 1967, with 1 there on 7 Oct 1967; and 1, Salem Lake, 15 Jul 1975.
Mountains Accidental, after storms. One in the Mills River area (Henderson) on 17 Sep 2004 [Chat 69:52 link].
Finding Tips A few Gull-billed Terns can be usually be seen at Pea Island, at Fort Fisher, and at many areas along the coast, but with each passing year, it is not the gimme it used to be. They can be seen swooping over marshes and even dunes, looking for lizards, grasshoppers, and other terrestrial animal prey. Because they depart early, your best chances are from late Apr to late Jul.
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Attribution LeGrand[2015-12-24], LeGrand[2013-12-10], LeGrand[2013-11-24]
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 Gelochelidon nilotica