Common name: Black Tern
Scientific name: Chlidonias niger (Linnaeus, 1758)

Class:
Aves (Birds)
Order:
Charadriiformes (Gulls, Plovers, and Shorebirds)
Family:
Laridae (Terns, Gulls and Relatives)
Synonyms:
Other common names:

Habitat type(s):
Habitat description(s)
Estuarine:
Bay/sound, River mouth/tidal river, Lagoon, Tidal flat/shore
Lacustrine:
Deep water, Shallow water
Marine:
Pelagic, Near shore
Palustrine:
HERBACEOUS WETLAND, Riparian
Riverine:
BIG RIVER, MEDIUM RIVER, Low gradient
Terrestrial:
Grassland/herbaceous

Ecological systems and subsytems (about):
PALUSTRINE - OPEN MINERAL SOIL WETLANDS:
Deep emergent marsh (guide)
A marsh community flooded by waters that are not subject to violent wave action. Water depths can range from 6 in to 6.6 ft (15 cm to 2 m). Water levels may fluctuate seasonally, but the substrate is rarely dry, and there is usually standing water in the fall.
PALUSTRINE - PALUSTRINE CULTURAL:
Impounded marsh
A marsh (with less than 50% cover of trees) in which the water levels have been artificially manipulated or modified, often for the purpose of improving waterfowl habitat.
PALUSTRINE - OPEN MINERAL SOIL WETLANDS:
Shallow emergent marsh (guide)
A marsh meadow community that occurs on soils that are permanently saturated and seasonally flooded. This marsh is better drained than a deep emergent marsh; water depths may range from 6 in to 3.3 ft (15 cm to 1 m) during flood stages, but the water level usually drops by mid to late summer and the soil is exposed during an average year.

Conservation:
Global conservation status rank:
G4G5
Apparently or Demonstrably Secure globally - Uncommon to common in the world, but not rare; usually widespread, but may be rare in some parts of its range; possibly some cause for long-term concern due to declines or other factors. More information is needed to assign either G4 or G5.
State conservation status rank:
S2B
Imperiled in New York - Very vulnerable to disappearing from New York due to rarity or other factors; typically 6 to 20 populations or locations in New York, very few individuals, very restricted range, few remaining acres (or miles of stream), and/or steep declines. (A migratory animal which occurs in New York only during the breeding season.)
Federal protection:
Not Listed
State protection:
Endangered
Listed as Endangered by New York State: in imminent danger of extirpation in New York. For animals, taking, importation, transportation, or possession is prohibited, except under license or permit. For plants, removal or damage without the consent of the landowner is prohibited.
SGCN:
NYNHP track status:
Y: Track all extant and selected historical EOs

More information:
Conservation guide:
https://guides.nynhp.org/black-tern/
NatureServe explorer link:
https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.105682/Chlidonias_niger/