2016). Voice Clattering clackety-clack call. Helpers may provide extraparental care such as defending eggs and chicks from crabs and rats.

Henderson Crakes were affected by poison bait distributed on the island, and similar mortality needs to be anticipated in future eradication attempts (Oppel et al. 1995). A restricted-range species, range is only 37 km². comm. 1995, Waldren et al. You could also do it yourself at any point in time. Would you like Wikipedia to always look as professional and up-to-date? Other possible introductions, such as other Rattus species, diseases and exotic plant species, are potential future threats (Jones et al. Conservation Actions UnderwayIn 1988, Henderson was designated a World Heritage Site. The breeding season is long, extending from late July to mid February (double broods are not uncommon) and clutch-size is 2-3 (Jones et al.

Zapornia atra is endemic to Henderson in the Pitcairn Islands (to UK), a small uninhabited, raised-reef island in the south-central Pacific Ocean. Other possible introductions, such as other Rattus species, diseases and exotic plant species, are potential future threats (Jones et al. subtropical or tropical moist lowland forest. 1995, M. Brooke pers. 1995). 1995). Henderson Crakes were affected by poison bait distributed on the island, and similar mortality needs to be anticipated in future eradication attempts (Oppel et al. Cornell Lab of Ornithology, Ithaca, NY, USA. 1995).

1995).

A rat eradication attempt in 2011 reduced the population to probably <500 individuals, but because sufficient individuals were maintained in captivity during the eradication attempt, counts in 2013 and 2015 suggest that the population has largely recovered (S. Oppel and A. It is omnivorous and appears to be an opportunistic feeder, taking advantage of seasonal increases in prey (Jones et al. It is endemic to Henderson Island in the southeast Pacific Ocean. Congratulations on this excellent venture… what a great idea! The Henderson Crake (Porzana atra) is a rail endemic to the Pitcairn Islands - a group of four volcanic islands in the southern Pacific Ocean. To install click the Add extension button. The population of this species is estimated to be 6,200 mature individuals, roughly equivalent to 9,300 individuals in total. Henderson Island Crake (Zapornia atra), version 1.0.

In 2015, the estimated abundance of Henderson Crakes at 25 point count stations was 213 (95% CI 144-319) individuals, which would result in an overall population estimate of 8512 (95% CI 5755 -  12749) individuals assuming a survey radius of 100 m around each point (S. Oppel and A. Downloaded from

Population justificationNumbers were estimated at c.3,240 in 1987 (Graves 1992) and, using a different technique, c.6,200 birds in 1992; no major change in population size was evident in 2003 (Jones et al. Breeding in Pacific ocean: Henderson I.; can be seen in 1 country. 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 (Jones et al. 2007). It will enhance any encyclopedic page you visit with the magic of the WIKI 2 technology. Endemic to Henderson Island, Pitcairn Islands, South Pacific. 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 (Jones et al. Trend justificationStudies indicate that predation rates are low and reproduction rates are sufficient to replace birds lost, thus the population is suspected to be stable. Fairly common despite introduced Polynesian rat. Although Polynesian Rat Rattus exulans takes eggs and chicks, there is no indication that the species is unduly threatened by this predation as the two have co-existed on Henderson possibly since the 8th century (Jones et al. The accidental introduction of alien species could result in rapid population decline, or even extinction, as experienced by many other flightless island rails. 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 (Jones et al. Justification of Red List CategoryThis species qualifies as Vulnerable as it is only found on one small island.

Its natural habitat is subtropical or tropical moist lowland forest. 1995). A handful of other flightless rails survive on other Pacific islands too, but the fossil record suggests that well over 1000 such species once existed, each on its own piece of Paradise. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). The breeding season is long, extending from late July to mid February (double broods are not uncommon) and clutch-size is 2-3 (Jones et al. It is omnivorous and appears to be an opportunistic feeder, taking advantage of seasonal increases in prey (Jones et al. 1995). BirdLife International (2020) Species factsheet: Zapornia atra. Learn about Henderson Island Crake: explore photos, sounds, and observations collected by birders around the world.

A captive population of c.83 Henderson Crakes was established and maintained throughout the eradication operation to provide an insurance population. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. 1995, Waldren et al. This species is endangered by habitat destruction.

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 (Jones et al.

The Henderson crake or red-eyed crake (Porzana atra) is a species of flightless bird in the family Rallidae. 1995). Bond in litt. Text account compilersBenstead, P., Derhé, M., Mahood, S., O'Brien, A., Pilgrim, J., Stattersfield, A., Stringer, C. ContributorsBell, B., Hall, J., Bond, A., Oppel, S., Brooke, M. Recommended citation Bond in litt. Please Note: The articles or images on this page are the sole property of the authors or photographers. 1995). 2013). It is found in Oceania (Australia and islands). In August 2011, an attempt was made to eradicate R. exulans from Henderson island, but this failed and rat populations recovered by 2013 (Churchyard et al., 2013) . 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 (Jones et al. Although recruitment to the breeding population is not known, numbers of surviving chicks probably compensate for annual losses such that the population can be considered stable despite the continued presence of rats (Jones et al.

http://www.birdlife.org on 01/10/2020. 17 cm. It is endemic to Henderson Island in the southeast Pacific Ocean. Following a feasibility study (Brooke and Towns 2008) an attempt was made to eradicate rats from Henderson Island in 2011; this attempt was found to be unsuccessful, and rats returned to pre-eradication densities by 2013 (Churchyard et al. http://www.birdlife.org on 01/10/2020.
1995). 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 (Jones et al. It will enhance any encyclopedic page you visit with the magic of the WIKI 2 technology. 2016). 1995). 2016). http://purl.obolibrary.org/obo/NBO_0000367, http://purl.obolibrary.org/obo/GAZ_00000071, http://purl.obolibrary.org/obo/VT_0001259, http://eol.org/schema/terms/Tuamotu_tropical_moist_forests, http://www.worldwildlife.org/ecoregions/OC0115, http://purl.obolibrary.org/obo/RO_0002303, http://purl.obolibrary.org/obo/ENVO_00000118, http://purl.obolibrary.org/obo/GO_0040011, https://eol.org/schema/terms/mineralizedSkeletonContains, http://purl.obolibrary.org/obo/CHEBI_52254. 1995).

Downloaded from Small, flightless rail.

Individuals can grow to 88 g. Reproduction is dioecious. Henderson Crake relies on … … I use WIKI 2 every day and almost forgot how the original Wikipedia looks like. EOL has data for 8 attributes, including: Known occurrences, collected specimens and observations of Henderson Crake. That's it. Porzana atra (Henderson Crake) is a species of birds in the family rails. Porzana atra (Henderson Crake) is a species of birds in the family rails. The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. The Henderson crake or red-eyed crake (Zapornia atra) is a species of flightless bird in the family Rallidae. Individuals can grow to 88 g. Reproduction is dioecious. Henderson Crake relies on flight to move around.