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Larus delawarensis, Ring-billed gull

Common name (e.g. turtle)

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Larus delawarensis   Ord, 1815

Ring-billed gull
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Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Aves | Charadriiformes | Laridae

Environment: milieu / climate zone / depth range / distribution range Ecology

Others.  Subtropical; 62°N - 8°N, 126°W - 53°W (Ref. 124582)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Indo-Pacific, Atlantic Ocean and the Mediterranean: Belize, Costa Rica and Netherlands Antilles.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?  range ? - ? cm Max length : 53.0 cm TL male/unsexed; (Ref. 8812); max. published weight: 471.00 g (Ref. 356)

Short description Morphology

Culmen: 4.24 cm; tarsus: 5.08 cm; wing: 37.7 cm.

Biology     Glossary (e.g. epibenthic)

Total Length: 45 to 53 cm; Wingspan: 121 to 127 cm (Ref. 8812). Coastal; <31 km (Ref. 356). One of the few species that nest and forage in inland habitats, and move to the coast during non-breeding season. Nest of simple construction. Embryos are exceptionally known to elicit parental incubation behavior by vocalizing. Regurgitated pellets cast by adults to feed its cheeks during the nestling period contain mostly earthworms or fish (Ref. 87784). Display dipping and surface plunging (Ref. 356).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference References | Coordinator | Collaborators

Lepage, D. 2007. (Ref. 7816)

IUCN Red List Status (Ref. 130435: Version 2024-2)

  Least Concern (LC) ; Date assessed: 08 August 2018

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Human uses


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Internet sources

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, Search) | Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 6.3 - 27.9, mean 12 (based on 2049 cells).
Vulnerability (Ref. 71543): Moderate vulnerability (41 of 100).
Price category (Ref. 80766): Unknown.

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