Striped kingfisher

The striped kingfisher (Halcyon chelicuti) is a species of bird in the tree kingfisher subfamily. It was first described by Edward, Lord Stanley, in Salt's Voyage to Abyssinia[2] in 1814 as "Chelicut kingfisher" Alaudo Chelicuti.[3]

Striped kingfisher

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Coraciiformes
Family: Alcedinidae
Subfamily: Halcyoninae
Genus: Halcyon
Species:
H. chelicuti
Binomial name
Halcyon chelicuti
Stanley, 1814
Juvenile H. c. chelicuti, Uganda

The genus name Halcyon comes from a bird in Greek legend generally associated with the kingfisher. There was an ancient belief that the halcyon nested on the sea, which it calmed in order to lay its eggs on a floating nest.[4] The species' name chelicuti derives from Chelicut in Ethiopia, the location at which Stanley's type specimen was obtained.[5]

This is a highly territorial bird which will chase off not only others of the same species, but also shrikes, doves and rollers. The territory may be up to three hectares (7.4 acres) in size, and hold 100 tall trees. It is surveyed from a treetop by its owner, who sings from before dawn intermittently until after midday.[5]

Range and habitat

This species occurs in Sub-Saharan Africa except in dense forests (especially near the Congo River), the Horn of Africa, the Namib Desert and South Africa. It prefers woodland, thorn scrub (thornveld), dry bush, and open savanna,[6][7][8] but avoids intensively farmed land.[5]

There are two subspecies: H. c. chelicuti in most of the range, and H. c. eremogiton (Hartert, 1921)[9] in the northern desert parts of the range from central Mali to the White Nile region of eastern Sudan.[10] They hybridize in southern Mali.[11]

Description

The striped kingfisher of the nominate subspecies H. c. chelicuti averages 16 to 18 cm[8] (about 6.5 in)[7] from beak to tail. Perched adults look mostly greyish brown on the upper part of the body. The lower back, secondary flight feathers, and tail are metallic blue; this colour is much more visible when the bird flies than when it is perched,[7][8] as is a white patch at the base of the primary flight feathers.[8] The wing linings are white with a black border, and in males a black bar at the base of the primaries.[8] The underparts are off-white, buffier on the breast, with brown streaks on the sides in Kenyan birds[7] and also on the breast in southern African birds.[8][12] Also streaked dark brown is the top of the head, with the background buffy grey in males and brownish in females. The sides of the head, throat, and a collar around the back of the neck continue the off-white of the underparts. A black line goes around the back of the neck, above the white collar, and through the eyes. The bill is blackish above and at the tip, otherwise reddish-orange below.[7][8]

The juvenile resembles the adult but is paler. It has less blue on the wings, a darker crown, dusky tips to the breast feathers, and dull red on the lower mandible.[7][8]

The call is distinctive, "a high-pitched, piercing 'cheer-cherrrrrr'"[8] or a far-carrying "KEW, kerrrrrrrrr" in which the rs represent a repeated descending trill lower in pitch than the first note.[7] It is often given at dusk in a display where the bird opens its wings.[12]

The northern subspecies H. c. eremogiton has a grey-brown crown and mantle and almost unstreaked underparts.[5]

Food

The striped kingfisher eats mostly grasshoppers followed by other large insects. Small lizards, snakes and rodents are occasionally taken. It hunts from a perch about 3 metres (10 ft) high swooping to the ground for prey up to ten times a minute. Food items are taken back to the perch and swallowed, large prey being beaten vigorously first.[5]

Grasshoppers taken to the nest to feed the young are presented to the chicks head-first, in much the same way that aquatic kingfishers deliver fish to their offspring.[5]

Reproduction

A mated pair of striped kingfishers display by sitting facing each other in a treetop with tail cocked. The wings are flicked open and shut as the birds sing. the pee-hee song soon becomes a sequence of short trills and pauses.[5]

The female lays eggs in a disused woodpecker or barbet hole. Both sexes incubate during the day, but only the female at night. The male feeds the female, but holds the prey items while the female tears off pieces. Lesser honeyguides and greater honeyguides parasitise up to a quarter of nests.[5]

This species is usually monogamous, but polyandry has been recorded. The striped kingfisher is normally double-brooded.[5]

Status

The striped kingfisher has a large range, estimated at 13 million square kilometres (5 million square miles), and is believed to have a large population. The species is not considered to be approaching the IUCN Red List population criterion of declining more than 30% in ten years or three generations, and is therefore evaluated as Least Concern.[1]

Notes
  1. BirdLife International (2012). "Halcyon chelicuti". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.CS1 maint: ref=harv (link)
  2. Salt (1816)
  3. In the index on p432 the genus is given as Alcedo, but the description on p439 is headed, presumably in error, as Alaudo.
  4. Halcyon days
  5. Fry (1992)
  6. Lack (2006).
  7. Zimmerman, Turner, and Pearson (1999). Statements with only this reference may refer only to Kenya.
  8. Sinclair and Hockey (2007). Statements with only this reference may refer only to southern Africa.
  9. Peterson (1999)
  10. Batchelder et al.
  11. McCarthy (2006)
  12. Butchart (2000).
gollark: zstd supports custom dictionaries, as I said, and apparently can have really good compression ratios if you tune it right.
gollark: > Brotli is a data format specification[2] for data streams compressed with a specific combination of the general-purpose LZ77 lossless compression algorithm, Huffman coding and 2nd order context modelling. Brotli is a compression algorithm developed by Google and works best for text compression. ħmm, apparently maybe ish?
gollark: Or brotli with a custom dictionary, actually.
gollark: You could use zstd with a custom dictionary?
gollark: paiaologoasgoagihsig: string compression testing‽

References
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