Henderson crake

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Henderson crake
Porzana atra.Imagen fija003.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Class: Aves
Order: Gruiformes
Family: Rallidae
Genus: Zapornia
Species:
Z. atra
Binomial name
Zapornia atra
(North, 1908)
Synonyms

Nesophylax ater
Porzana atra

The Henderson crake or red-eyed crake (Zapornia atra) is a species of flightless bird in the family Rallidae. It is endemic to Henderson Island in the southeast Pacific Ocean. Its natural habitat is dense to open forest. [1]

Contents

The population of this species is estimated to be 5,600 mature individuals, roughly equivalent to 8,500 individuals in total. [1]

Habitat and ecology

The species is found in dense to open forest throughout the island plateau, both in forest dominated by Pisonia and Pisonia/ Xylosma , and in Timonius thicket, also occurring in Pandanus Thespesia Argusia embayment forests and coconut groves on the beaches. [2] It is omnivorous and appears to be an opportunistic feeder, taking advantage of seasonal increases in prey. [2] It forages in the leaf-litter, gleaning items such as skink Emoia cyanura eggs from the undersides of fallen leaves, large nematodes, beetles, moths, spiders, dead caterpillars, land snails and small insects. [2] The breeding season is long, extending from late July to mid February (double broods are not uncommon) and clutch-size is 2–3. [2] Helpers may provide extraparental care such as defending eggs and chicks from crabs and rats. Based on a small sample, adult annual survival is at least 43%, and reproductive success is a minimum of 0.95 chicks surviving to one month old per pair, per annum. [2]

The population of the species was severely affected by a failed rodent eradication campaign on Henderson in 2011, but had returned to pre-eradication levels by 2015. [1] [3]

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References

  1. 1 2 3 4 BirdLife International. (2022). "Zapornia atra". IUCN Red List of Threatened Species . 2022: e.T22692711A213098423. doi: 10.2305/IUCN.UK.2022-1.RLTS.T22692711A213098423.en . Retrieved 10 October 2023.
  2. 1 2 3 4 5 Jones, P.; Schubel, S.; Jolly, J.; Brooke, M. de L.; Vickery, J. (1995). "Behaviour, natural history, and annual cycle of the Henderson Island Rail Porzana atra (Aves: Rallidae)". Biological Journal of the Linnean Society. 56 (1–2): 167–183. doi:10.1111/j.1095-8312.1995.tb01083.x.
  3. Bond, Alexander L.; Brooke, M. de L.; Cuthbert, Richard J.; Lavers, Jennifer L.; McClelland, Gregory T. W.; Churchyard, Thomas; Donaldson, Angus; Duffield, Neil; Forrest, Alice; Harrison, Gavin; Mackinnon, Lorna; Proud, Tara; Skinner, Andrew; Torr, Nick; Vickery, Juliet A.; Oppel, Steffen (10 April 2018). "Population status of four endemic land bird species after an unsuccessful rodent eradication on Henderson Island". Bird Conservation International. 29 (1): 124–135. doi: 10.1017/S0959270918000072 .