Rufous-cheeked nightjar

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Rufous-cheeked nightjar
Caprimulgus rufigena - Swedish Museum of Natural History - Stockholm, Sweden - DSC00619.JPG
C. rufigena specimen in the Swedish Museum of Natural History
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Clade: Strisores
Order: Caprimulgiformes
Family: Caprimulgidae
Genus: Caprimulgus
Species:
C. rufigena
Binomial name
Caprimulgus rufigena
Smith, 1845

The rufous-cheeked nightjar (Caprimulgus rufigena) is a species of nightjar in the family Caprimulgidae. It is an intra-African migrant that breeds in the south of its range. It spends the non-breeding season in eastern Nigeria, Cameroon, southern Chad and Sudan, the Republic of the Congo, the D.R.C. and western Central African Republic. Throughout the year it can be found in Southern Africa. [2] [3] It is a nocturnal species that feeds on flying insects, mainly hunting at dusk and the early night. They can hunt at night thanks to their large eyes that are adept at seeing in the dark. They cannot see in complete darkness and most likely cannot see colours either. [4] [5] The rufous-cheeked nightjar forms monogamous pairs and the egg laying period is from September to November. [6] It looks very similar to other African nightjars and they are frequently misidentified during research and studies. [5] [6] [7]

Contents

Description

Similar to that of the Fiery-necked nightjar, the rufous-cheeked nightjar is 23–24 cm tall with a male weighing 48-65g and a female weighing 46-66g, [3] and has a typical Nightjar body shape. Paler than the Fiery-necked nightjar, the rufous-necked nightjar has a dark brown body decorated with rufous-coloured spots and a less distinct rufous-coloured collar. Like most Nightjars, it has a short, slightly curved black beak. A male has white marks on the primaries and the tail corner, while in females it is buff. Compared to the Fiery-necked nightjar, the male rufous-cheeked nightjar has more white in the primaries and less in the tail, while females have less of the buff colouring. [2] Its colours allow it to camouflage perfectly with the substrate of its preferred habitat. Juvenile down feathers give the young a disrupting counter-shading pattern which makes them even harder to locate. [7]

Taxonomy

The rufous-cheeked nightjar is in the Caprimulgiformes order which after changes in 2021 solely contains the Caprimulgidae family. [8] The members of this family are all nocturnal. The 90 species in Caprimulgidae are separated into two subfamilies; Caprimulginae which consists of the nightjars, and Chordeilinae which consists of the nighthawks. The rufous-cheeked nightjar belongs to the Caprimulginae subfamily which are characterized by their long rictal bristles that the Chordeilinae lack, as well as a schizognathous palate and short, rounded wings. There are 16 genera within the Caprimulgidae family, with the Chordeilinae containing 4 and Caprimulginae containing 12. [9]

Subspecies

Habitat and Distribution

Distribution

The rufous-cheeked nightjar can be found in Southern Africa year-round, it can be found in Angola, Zambia, Botswana, Mozambique, Namibia, Zimbabwe, and South Africa, although it is absent from the east coast of Southern Africa, Natal, and west Namibia. Its non-breeding grounds are largely in Cameroon, but they have been found in Nigeria, D.R.C, the Republic of the Congo, southern Chad and in the Darfur region of Sudan. [2] [3]

Habitat

The rufous-cheeked nightjar can usually be found in wooded habitats such as the miombo woodland, wooded savanna, and woodland edges and clearings. It can also be found in more open habitats such as the semi-arid acacia shrubland and semi-deserts. [3] For breeding and nesting they prefer dryer areas and avoid rivers, lakes, valleys, as well as moist areas. They nest both within and outside wooded areas, however, when they nest outside wooded areas, they prefer bare areas often those that have been recently burned down. [6]

Behavior

Vocalization

The Rufous-cheeked nightjar has two main flight calls. One is an upbeat "Q! Q! Q! Q!" and the other is a harsh "oar! oar! oar!" they are sung with slight pauses. The nightjar also has a territoriality song, it starts with preliminary coughs "Q-whoop...Q-whoop...Q-whoop" with the "Q" in the cough being a softer version of the Q! flight call. Afterwards, the nightjar starts churring at 31 and 32–37.5 notes/second, this churring lasts for several minutes and will start to slow down near the end. When another rufous-cheeked nightjar enters the territory, the churring will change to another song depending on the intruder's gender. A male will be met with oaring similar to that of the flight call, while a female will be sung a song that sounds like purring. [7]

Diet

The rufous-cheeked nightjar primarily hunts at dusk and early night but has also been seen to hunt in the moonlight and at dawn. [5] They primarily eat beetles, but also eat moths, grasshoppers and other flying insects. [4] Nightjars are skilled hunters and are able to fill their stomachs during the short time of dusk. Nightjars frequently leave their territory while hunting, and even travel to different habitats. The rufous-cheeked nightjar hunts in open woodlands and waterholes where it can drink water while flying, they also hunt by roads where insects gather because they are attracted to street lights. They primarily perch low to the ground to watch their prey, and once spotted they will leap towards it, snatch it, and land back on the same spot they started. They do not solely use this tactic, they will sometimes fly and search for their prey as well. Their main way of locating prey is by using their large eyes which are well-equipped to see in the dark, however they cannot see in complete darkness. [5]

Reproduction

Rufous-cheeked nightjars are a monogamous species, both partners watch over the nest with the male watching the nest at night and the female during the day. [7] The breeding period usually takes place from September to November. [6] The male will find and claim a territory during the breeding season and within this territory, he will begin his territorial song which consists of churring throughout the night, letting other males know that that is his territory and inviting females. The churring is continuous and can last for several minutes, however when the moon is obstructed the churring will temporarily halt. If another male approaches his territory the rufous-cheeked nightjar will begin oaring until they are scared away, and he will begin purring if a female approaches. Once a female approaches, she will inspect his territory, and if suitable she will decide on a nesting location and they will begin breeding immediately. Since noise will attract predators, the male stops churring during breeding, and will only sing when he switches places with the female to watch over the nest. [7]

Similar to other nightjars, the breeding habits of the rufous-cheeked nightjar seem to follow a lunar schedule, although this has yet to be confirmed. Following this cycle, the nightjars lay their eggs about one week following a full moon. Replacement clutches do not follow this cycle. [7]

The rufous-cheeked nightjar usually lays two eggs per clutch with an incubation period of 15–17 days, however they have been seen to lay only one egg. Laying one egg is more frequently seen with replacement clutches. The eggs are glossy and are usually a pale pinkish-cream colour. The eggs are on average 27.17 x 20.09 mm and weigh on average 5.86g. Rufous-cheeked nightjars do not make nests, they simply make small grooves on the floor of their chosen spot and lay their eggs in there. The bird's plumage makes perfect camouflage, so the presence of a nest would only inform predators of their location. The main issue with such a well concealed nest is that the parents would have a hard time finding it themselves. To solve this problem, the rufous-cheeked nightjar uses quartzite blocks as landmarks to lead them to their nest. [6] [7]

Related Research Articles

<span class="mw-page-title-main">Nightjar</span> Family of birds

Nightjars are medium-sized nocturnal or crepuscular birds in the family Caprimulgidae and order Caprimulgiformes, characterised by long wings, short legs, and very short bills. They are sometimes called goatsuckers, due to the ancient folk tale that they sucked the milk from goats, or bugeaters, their primary source of food being insects. Some New World species are called nighthawks. The English word "nightjar" originally referred to the European nightjar.

<span class="mw-page-title-main">European nightjar</span> Migratory bird found in Eurasia and Africa

The European nightjar, common goatsucker, Eurasian nightjar or just nightjar, is a crepuscular and nocturnal bird in the nightjar family that breeds across most of Europe and the Palearctic to Mongolia and Northwestern China. The Latin generic name refers to the old myth that the nocturnal nightjar suckled from goats, causing them to cease to give milk. The six subspecies differ clinally, the birds becoming smaller and paler towards the east of the range. All populations are migratory, wintering in sub-Saharan Africa. Their densely patterned grey and brown plumage makes individuals difficult to see in the daytime when they rest on the ground or perch motionless along a branch, although the male shows white patches in the wings and tail as he flies at night.

<span class="mw-page-title-main">Nighthawk</span> Subfamily of birds

The nighthawk is a nocturnal bird of the subfamily Chordeilinae, within the nightjar family, Caprimulgidae, native to the western hemisphere. The term "nighthawk", first recorded in the King James Bible of 1611, was originally a local name in England for the European nightjar. Its use in the Americas to refer to members of the genus Chordeiles and related genera was first recorded in 1778.

<span class="mw-page-title-main">Red-necked nightjar</span> Species of bird

The red-necked nightjar is the largest of the nightjars occurring in Europe. It breeds in Iberia and North Africa, and winters in tropical West Africa.

<span class="mw-page-title-main">Standard-winged nightjar</span> Species of bird

The standard-winged nightjar is a nocturnal bird in the nightjar family.

<span class="mw-page-title-main">Indian nightjar</span> Species of bird

The Indian nightjar is a small nightjar which is a resident breeder in open lands across South Asia and Southeast Asia. Like most nightjars it is crepuscular and is best detected from its characteristic calls at dawn and dusk that have been likened to a stone skipping on a frozen lake - a series of clicks that become shorter and more rapid. They are sometimes spotted on roads when their eyes gleam red in the spotlight of a vehicle. There is considerable plumage variation across its range and can be hard to differentiate from other nightjars in the region especially in the field.

Prigogine's nightjar or the Itombwe nightjar, is a bird species of tropical central Africa. It is known from only one specimen taken at Malenge in the Itombwe Mountains in Zaire in August 1955.

<i>Caprimulgus</i> Genus of birds

Caprimulgus is a large and very widespread genus of nightjars, medium-sized nocturnal birds with long pointed wings, short legs and short bills. Caprimulgus is derived from the Latin capra, "nanny goat", and mulgere, "to milk", referring to an old myth that nightjars suck milk from goats. The common name "nightjar", first recorded in 1630, refers to the nocturnal habits of the bird, the second part of the name deriving from the distinctive churring song.

<span class="mw-page-title-main">Pennant-winged nightjar</span> Species of bird

The pennant-winged nightjar is a species of nightjar that occurs from Nigeria to northern South Africa. It is an intra-African migrant and displays remarkable sexual dimorphism in the breeding season.

<span class="mw-page-title-main">Bates's nightjar</span> Species of bird

Bates's nightjar or the forest nightjar, is a bird species of the family Caprimulgidae, found in the rainforests of western Sub-Saharan Africa.

<span class="mw-page-title-main">Golden nightjar</span> Species of bird

The golden nightjar is a species of nightjar in the family Caprimulgidae. It is found in Sahel region in northern Sub-Saharan Africa.

<span class="mw-page-title-main">Pygmy nightjar</span> Species of bird

The pygmy nightjar is a species of nightjar in the family Caprimulgidae. It is endemic to Brazil.

<span class="mw-page-title-main">Band-winged nightjar</span> Species of bird

The band-winged nightjar or greater band-winged nightjar is a species of nightjar in the family Caprimulgidae. It is widespread in South America, where it is found in the Andes, Venezuelan Coastal Range, Santa Marta Mountains, Tepuis, most of Chile, Argentina, Paraguay, Uruguay, and eastern Brazil. It occurs in a wide range of habitats, from the edge of humid montane forests to shrubby semi-deserts and urban rooftops.

<span class="mw-page-title-main">Blackish nightjar</span> Species of bird

The blackish nightjar is a species of bird in the family Caprimulgidae. It is found in Brazil, Bolivia, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela.

<span class="mw-page-title-main">Fiery-necked nightjar</span> Species of bird

The fiery-necked nightjar is a species of nightjar in the family Caprimulgidae, which is found mostly in Africa south of the equator, though it has been spotted in a few countries north of the equator. It is most often found in woodland savannas or other deciduous woodlands. It is usually distinguished by its tawny coloured collar which gives the species its common name. It has a distinctive call that many have rendered as 'good-lord-deliver-us'. The fiery-necked nightjar is an insectivorous species that mostly eats butterflies, moths and other insects. The fiery-necked nightjar breeds after the dry season and typically produce two clutches with two eggs per clutch.

<span class="mw-page-title-main">Tawny-collared nightjar</span> Species of bird

The tawny-collared nightjar is a species of nightjar in the family Caprimulgidae. It is endemic to Mexico.

<span class="mw-page-title-main">Silky-tailed nightjar</span> Species of bird

The silky-tailed nightjar is a species of nightjar birds in the family Caprimulgidae. It is found in Brazil, Argentina, Bolivia, Paraguay, and Peru. Its natural habitat is subtropical or tropical moist lowland forests.

<span class="mw-page-title-main">Freckled nightjar</span> Species of bird

The freckled nightjar or freckled rock nightjar is a species of nightjar in the family Caprimulgidae. It has a wide yet patchy distribution throughout the Afrotropics.

<span class="mw-page-title-main">Spotted nightjar</span> Species of bird

The spotted nightjar or spotted eared-nightjar is a species of nightjar in the family Caprimulgidae. It inhabits much of mainland Australia and has also been found in several Indonesian islands. Its natural habitats are open forests and woodlands, scrub, spinifex and tussock grassland, savannah woodland and mangroves.

<span class="mw-page-title-main">White-throated nightjar</span> Species of bird

The white-throated nightjar or white-throated eared-nightjar is a species of nightjar in the family Caprimulgidae. It is endemic to eastern Australia; it is a non-breeding winter visitor in Papua New Guinea. Its natural habitat is subtropical or tropical dry forests.

References

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  2. 1 2 3 "Rufous-cheeked Nightjar - eBird". ebird.org.
  3. 1 2 3 4 Cleere, Nigel (2020). "Rufous-cheeked Nightjar (Caprimulgus rufigena), version 1.0". Birds of the World. doi:10.2173/bow.rucnig1.01. S2CID   216280991.
  4. 1 2 Jackson, H. D.; Oatley, T. B. (September 2000). "Food of the nightjars in Zimbabwe". Ostrich. 71 (3–4): 404–407. doi:10.1080/00306525.2000.9639841. S2CID   84419599.
  5. 1 2 3 4 Jackson, Hd (September 2003). "A review of foraging and feeding behaviour, and associated anatomical adaptations, in Afrotropical nightjars". Ostrich. 74 (3–4): 187–204. doi:10.2989/00306520309485392. S2CID   84495706.
  6. 1 2 3 4 5 Colebrook-Robjent, J. F. R. (March 1984). "Nests and Eggs of Some African Nightjars". Ostrich. 55 (1): 5–11. doi:10.1080/00306525.1984.9634588.
  7. 1 2 3 4 5 6 7 Jackson, H. D. (25 February 2015). "Jackson, H. D. "Rufous-cheeked nightjar Caprimulgus rufigena behaviour during the breeding season in Zimbabwe" (PDF). BOC. 135 (3): 247–266. Retrieved 15 October 2023.
  8. "Taxonomic Updates – IOC World Bird List". www.worldbirdnames.org.
  9. Han, Kin-Lan; Robbins, Mark B.; Braun, Michael J. (1 May 2010). "A multi-gene estimate of phylogeny in the nightjars and nighthawks (Caprimulgidae)". Molecular Phylogenetics and Evolution. 55 (2): 443–453. doi:10.1016/j.ympev.2010.01.023. PMID   20123032.