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Burhinus vermiculatus

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Cladus: Avemetatarsalia
Cladus: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauriformes
Cladus: Dracohors
Cladus: Dinosauria
Ordo: Saurischia
Cladus: Eusaurischia
Subordo: Theropoda
Cladus: Neotheropoda
Cladus: Averostra
Cladus: Tetanurae
Cladus: Avetheropoda
Cladus: Coelurosauria
Cladus: Tyrannoraptora
Cladus: Maniraptoromorpha
Cladus: Maniraptoriformes
Cladus: Maniraptora
Cladus: Pennaraptora
Cladus: Paraves
Cladus: Eumaniraptora
Cladus: Avialae
Infraclassis: Aves
Cladus: Euavialae
Cladus: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Ornithuromorpha
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Cladus: Neoaves
Ordo: Charadriiformes
Subordo: Charadrii

Familia: Burhinidae
Genus: Burhinus
Species: Burhinus vermiculatus
Subspecies: B. v. buettikoferi – B. v. vermiculatus
Name

Burhinus vermiculatus (Cabanis, 1868)
Synonymy

Oedicnemus vermiculatus (protonym)

References

Journal für Ornithologie 16: 413.

Vernacular names
Afrikaans: Waterdikkop
العربية: كروان مائي
azərbaycanca: Su pərttəgözü
brezhoneg: Bourlagad-dour
català: Torlit d'aigua
čeština: Dytík tmavý
Cymraeg: Rhedwr y dŵr
dansk: Vandtriel
English: Water Thick-knee
español: Alcaraván acuático
suomi: Rantapaksujalka
français: Œdicnème vermiculé
עברית: כרוון המים
magyar: Parti ugartyúk
italiano: Occhione vermicolato
Nederlands: Watergriel
Diné bizaad: Beʼekʼidbąąh goditání
svenska: Vattentjockfot

The water thick-knee (Burhinus vermiculatus), or water dikkop is a species of bird in the thick-knee family Burhinidae. The species is found across sub-Saharan Africa, usually close to water.

Distribution and habitat

The water thick-knee has a widespread distribution in sub-Saharan Africa, being found in Angola, Botswana, Burkina Faso, Burundi, Cameroon, Central African Republic, Republic of the Congo, Democratic Republic of the Congo, Eswatini, Ivory Coast, Ethiopia, Gabon, Ghana, Kenya, Liberia, Malawi, Mozambique, Namibia, Niger, Nigeria, Rwanda, Senegal, Somalia, South Africa, Tanzania, Uganda, Zambia, and Zimbabwe.

Across its range it is found on the edges of lakes, estuaries and rivers, as well as mangroves and also some sheltered beaches. It also needs bushes or nearby woodlands for shelter. It is found from sea-level to 1,800 m (5,900 ft).[2]
Description
A captive bird stretching its wings

The water thick-knee is 38 to 41 cm (15–16 in) and weighs 293–320 g (10.3–11.3 oz). It has a heavy bill that is black with yellow at the base. The wings are broad and blunt and the tail is short.[2]
Behaviour

The water thick-knee is a terrestrial feeder that forages at night. Although it is typically associated with water it can be found foraging up to 1 km (0.62 mi) from water. It feeds on insects, crustaceans and mollusks.[2]

The water thick-knee generally breeds in the dry season or early rainy season. It is a monogamous breeder. The nest is a simple scrape in sandy or stony ground, usually close to water. The clutch size is two sandy-yellow eggs. Both sexes incubate the eggs for 22-25 days, and both are responsible for feeding the young.[2]
References

BirdLife International (2016). "Burhinus vermiculatus". IUCN Red List of Threatened Species. 2016: e.T22693584A93413917. doi:10.2305/IUCN.UK.2016-3.RLTS.T22693584A93413917.en. Retrieved 12 November 2021.
Hume, R; Kirwan, G. M. (2019). del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David A; de Juana, Eduardo (eds.). "Water Thick-knee (Burhinus vermiculatus)". Handbook of the Birds of the World Alive. Barcelona: Lynx Edicions. Retrieved 11 February 2019.

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