Creagrus furcatus (Néboux, 1846)
Swallow-tailed gull
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Family:  Laridae ()
Max. size:  57 cm TL (male/unsexed); max.weight: 740.0 g
Environment:  others; marine; depth range 0 - 1 m
Distribution:  Southeast Pacific. From Costa Rica to Chile. Tropical to subtropical.
Diagnosis:   
Biology:  The world's only night-feeding gull; It pursuits squid and nocturnal fish at open sea (Ref. 356). Breeding attempts occur between migration events (Ref. 93225). It feeds by surface plunging, having access to only 1 meter of the water column (Ref. 93225), and feeds between 16-32 km from coastline (Ref. 356). Foraging activity increases following the DVM cycle, during new moon periods (Ref. 93225).
IUCN Red List Status: (LC); Date assessed: 08 August 2018 Ref. 123251)
Threat to humans: 
Country info:   
 

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