Gelochelidon nilotica, Gull-billed tern
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Gelochelidon nilotica   Gmelin, 1789

Gull-billed tern
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Classification / Names Populärnamn | synonymer | CoL | ITIS | WoRMS

Aves | Charadriiformes | Laridae

Environment: milieu / climate zone / djupintervall / distribution range Ekologi

; brackvatten.  Tropical; 56°N - 44°S, 116°W - 173°E (Ref. 124582)

Distribution Länder | FAO områden | Ekosystem | Förekomster | Utplanteringar

Indo-Pacific, Atlantic Ocean and the Mediterranean.

Length at first maturity / Size / Weight / Age

Könsmognad: Lm ?  range ? - ? cm Max length : 43.0 cm TL hane/ej könsbestämd; (Ref. 8812); publicerad maxvikt: 290.00 g (Ref. 356)

Short description Morfologi

Culmen: 4.1 cm; tarsus: 2.3 cm; wing: 33.0 cm.

Biologi     Ordlista (t.ex. epibenthic)

Total Length: 35 to 43 cm; Wingspan: 86 to 103 cm (Ref. 8812). Total population is 55,000 pairs, mostly in Asia, 40,000 pairs. European population of about 6,800 to 160,000 pairs is declining due to loss of habitat (Ref. 84934). Surface seizing; coastal; coastal Islands (Ref. 356). Feeds by dipping to the sea surface with occasional plunge-dives. Breeds colonially in salt marshes, salt works, coastal dunes, islands and freshwater lagoons in southern North America, Caribbean, South America, Europe, Asia, Australia and northern Africa (Ref. 84934). Gull-billed terns are observed to display group adherence. This species has a high nest fidelity in stable habitats, and yet when environmental disasters occur, they retain their mates and settle with the same neighbors at the breeding locality (Ref. 87784).

Life cycle and mating behavior Könsmognad | Reproduktion | Lek | Eggs | Fecundity | Larvae

Main reference referenser | Koordinator | Medarbetare

Enticott, J. and D. Tipling 1997 Seabirds of the World: the complete reference. Singapore: New Holland (Publishers) Ltd. 234 p. (Ref. 84934)

IUCN Red List Status (Ref. 130435: Version 2025-1)

  Least Concern (LC) ; Date assessed: 14 August 2019

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Appendix II: Migratory species conserved through agreements

Threat to humans

Human uses


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Ytterligare information

Trophic Ecology
Food items (preys)
Födosammansättning
Födointag
Predatorer
Ekologi
Ekologi
Population dynamics
Tillväxt
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Abundans
Life cycle
Reproduktion
Könsmognad
Fecundity
Lek
Eggs
Egg development
Larvae
Distribution
Länder
FAO områden
Ekosystem
Förekomster
Utplanteringar
Physiology
Syreförbrukning
Human Related
Stamps, coins, misc.
Outreach
Medarbetare
Taxonomy
Populärnamn
synonymer
Morfologi
Bilder
referenser
referenser

Internet-källor

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Publication : search) | Fishipedia | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Tree of Life | Wikipedia (Go, sök) | Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 12.1 - 29.1, mean 27.1 (based on 5421 cells).
Fishing Vulnerability (Ref. 71543): Low to moderate vulnerability (33 of 100).
Price category (Ref. 80766): Unknown.

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