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Contents

   



(Top)
 


1 Description  





2 Distribution and habitat  





3 Behaviour  



3.1  Breeding  





3.2  Feeding  







4 References  





5 External links  














Hartlaub's gull






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From Wikipedia, the free encyclopedia
 


Hartlaub's gull

Conservation status


Least Concern  (IUCN 3.1)

Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Laridae
Genus: Chroicocephalus
Species:
C. hartlaubii
Binomial name
Chroicocephalus hartlaubii

(Bruch, 1855)

Synonyms

Larus hartlaubii

Hartlaub's gull (Chroicocephalus hartlaubii), also known as the king gull, it is a small gull. It was formerly sometimes considered to be a subspecies of the silver gull (C. novaehollandiae), and, as is the case with many gulls, it has traditionally been placed in the genus Larus but is now placed in the genus Chroicocephalus. The species' name commemorates the German physician and zoologist, Gustav Hartlaub.[1]

Description

[edit]
Cape Town, South Africa

Hartlaub's gull is 36–38 cm in length. It is a mainly white gull with a grey back and upperwings, black wingtips with conspicuous white "mirrors", and a dark red bill and legs. When breeding it has a very faint lavender grey hood, but otherwise has a plain white head. Sexes are similar. This species differs from the slightly larger grey-headed gull in its thinner, darker bill, deeper red legs, paler, plainer head, and dark eyes. It takes two years to reach maturity. Juvenile birds have a brown band across the wings. They differ from same-age grey-headed gulls in that they lack a black terminal tail band, less dark areas in the wings, darker legs, and a white head.

Distribution and habitat

[edit]

The gull is a non-migratory breeding resident endemic to the Atlantic Ocean coastline of South Africa and Namibia. Although it is predominantly coastal or estuarine, it is not a pelagic species, and is rarely seen at sea far from land. About one half of the total population, currently estimated at 30 000 birds, lives within the Greater Cape Town area. It has accommodated well to humans, and can become very tame around habitations. Although it is a relatively rare species, about the tenth rarest of the world's 50 or so gull species, it is common in its range and is widely regarded in Cape Town as a nuisance, fouling buildings and bathing in urban ponds. It has, at times, been a hazard to aircraft near airports.

Behaviour

[edit]

Like most gulls, Hartlaub's is highly gregarious in winter, both when feeding or in evening roosts. This is a noisy species, especially at colonies. The call is a raucous crow-like kaaarrh. This species is frequently the subject of complaints about the noise it makes in urban areas.

Breeding

[edit]

Hartlaub's gull breeds in large colonies, and the main traditional breeding colony for the Cape Town area is on Robben Island. The adults fly to the mainland to find food for their chicks, a round trip of about 24 km.

Feeding

[edit]

The species is omnivorous like most Larus gulls, and they will scavenge at tips and feed on scraps as well as seeking suitable small prey, often by wading in shallow water.

References

[edit]
  1. ^ Beolens, Bo; Watkins, Michael (2003). Whose Bird? Men and Women Commemorated in the Common Names of Birds. London: Christopher Helm. p. 180-159-160.
[edit]
Retrieved from "https://en.wikipedia.org/w/index.php?title=Hartlaub%27s_gull&oldid=1225391626"

Categories: 
IUCN Red List least concern species
Chroicocephalus
Birds of Southern Africa
Birds described in 1853
Taxa named by Carl Friedrich Bruch
Hidden categories: 
Articles with short description
Short description matches Wikidata
Articles with 'species' microformats
Taxonbars with automatically added original combinations
 



This page was last edited on 24 May 2024, at 04:42 (UTC).

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