Zapata rail
Zapata rail | |
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Illustration by Allan Brooks | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Gruiformes |
Family: | Rallidae |
Genus: | Mustelirallus |
Species: | M. cerverai
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Binomial name | |
Mustelirallus cerverai (
Peters , JL, 1927) | |
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Green shows known range |
The Zapata rail (Mustelirallus cerverai) is a medium-sized, dark-coloured
The species was discovered by Spanish zoologist
Discovery and taxonomy
The Zapata rail was formally described by American
Barbour had been accompanied by the Spaniard on his previous visits to Cuba, and on hearing of the strange birds to be found in the Zapata area, he sent Cervera on a series of trips into the region. Cervera eventually found the rail near the very small settlement which is commemorated in the Spanish name for the rail, "Gallinuela de Santo Tomás".[5][6] Cervera also discovered the Zapata wren and the Zapata sparrow,[4] and his name is commemorated by the new ecological centre in the Ciénaga de Zapata National Park.[7]
The rail family contains more than 150 species divided into at least 50 genera, the exact number depending on the authority. The Zapata rail is a member of the genus Mustelirallus, and is considered to be related with Pardirallus. All six species in the two genera are long-billed, five have drab plumage, and all but one have a red spot at the bill base. They are believed to be descended from Amaurornis-like ancestral stock.[8]
Description
This is a medium-sized, dark rail, approximately 29 cm (11.4 in) long. The upperparts are olive-brown and the forehead, head sides and underparts are slate-grey, with some white barring on the lower belly. The flanks are grey-brown and the undertail is white. The iris, legs and feet are red, and the bill is yellow with a red base. The tail feathers are only sparsely barbed, and the wings are very short and rounded. The sexes are similar in appearance, but immature birds are duller and have olive feet and bill; the chicks, as with all rails, are covered with blackish down.[6][9][10] The Zapata rail's call is described as a bouncing cutucutu-cutucutu-cutucutu similar to that of the bare-legged owl,[11] and a loud limpkin-like kuvk kuck.[12] However, these calls may actually be those of the spotted rail.[13]
There are no similar species in Cuba; the
Distribution and habitat
This rail is a Cuban endemic restricted to the northern part of the 4500 km2 (1740 mi2) Zapata Swamp, which is also the only location for the
The species was once more widespread, with fossil bones found at Havana,[12] Pinar del Río and the Isla de la Juventud.[9] Barbour did not believe that the rail, Zapata sparrow and Zapata wren were relics in the sense that they once ranged widely over Cuba (as did, for example, the dwarf hutia and the Cuban crocodile), since the birds are so highly modified for swamp conditions. He considered that conditions similar to those found today may once have extended over the large submerged area now represented by the shallow banks, with scattered mangrove keys, which stretch towards the Isla de la Juventud and perhaps eastward along the southern Cuban coast.[4] The birds fossilized at Isla de la Juventud are smaller than the single extant specimen, but the paucity of available material makes it impossible to establish whether the populations were genuinely different.[16]
Behaviour
![Head and shoulders of elderly man in suit and tie](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2d/James_Bond_1974.jpg/220px-James_Bond_1974.jpg)
The Zapata rail usually breeds in Cladium jamaicensis sawgrass, building the nest above water-level on a raised tussock. Breeding occurs around September, and possibly also in December and January.
The bird prefers to feed in sawgrass. The diet is not recorded, but most marsh rails are omnivorous, feeding on invertebrates and plant material. The rails may disperse in the rainy season, returning to permanently flooded areas in the dry months.[12][19]
Like other rails, this species is difficult to observe as it moves through the sawgrass, and may crouch to avoid detection, but is not usually particularly wary. When disturbed, it may run a short distance and then stop with its tail raised and the conspicuous white undertail showing.
Conservation status
![elongated greenish catfish with long whiskers, dorsal fin running along most of back, and ventral fin along posterior half of belly](http://upload.wikimedia.org/wikipedia/commons/thumb/4/49/Clarias_garie_080516_9146_tdp.jpg/220px-Clarias_garie_080516_9146_tdp.jpg)
Island species of rails are particularly vulnerable to population loss since they frequently and rapidly evolve to become flightless or very weak fliers,[21] and are very susceptible to introduced predators. Fifteen species have become extinct since 1600,[22] and more than 30 are endangered.[23]
The species appears to have been easily found in the Santo Tomás area until 1931, but there were no further records until the 1970s when birds were found 65 km (40 mi) away at Laguna del Tesoro. The few records in subsequent years suggest that numbers remain low,[9] although after no official sightings for two decades, a 1998 survey found the birds at two new locations in the Zapata Swamp. Ten rails were detected at Peralta, and seven at Hato de Jicarita. On the basis of this sample it was estimated that 70–90 rails were present in the 230 hectares (570 acres) between the two sites.[6] As of 2016, the only sighting for several years was in November 2014.[24]
The Zapata rail is restricted to a single area, with an extent of about 1,000 km2 (400 mi2), and its small population, estimated on the basis of recent surveys and local assessments of population densities at 250–1,000 individuals, is assessed as decreasing. In the past, grass-cutting for roof thatch was a cause of extensive loss of breeding habitat, and habitat loss through dry-season burning of the vegetation continues. Predation by introduced small Asian mongooses and rats is a problem and, more recently, introduced African sharptooth catfish (Clarias gariepinus) have been identified as major predators of rail chicks.[12][25][26]
C. cerverai was classified as
Two remaining sites are in protected areas: the Corral de Santo Tomás Faunal Refuge, and the Laguna del Tesoro nature tourism area. Surveys have recently been conducted throughout the species' range and proposed
Future threats
Cuba has plans to encourage more tourists, including to the Zapata area, and changes to United States policy mean that its citizens are allowed to visit Cuba. In the future, this could further increase the effects of ecotourism; this might have a dangerous impact on the wetland, but there are ways in which the impact of mass tourism can be mitigated.[27]
In the longer term, the Ramsar-listed[28] swamp itself may be threatened. Rising sea levels due to global warming could contaminate the wetland with saltwater, damaging the plants and fauna, and by 2100 the area of Ciénaga de Zapata would be reduced by one-fifth. Higher ocean temperatures resulting from climate change could also lead to stronger hurricanes and drought. Bouza warned that the fallen vegetation left by hurricanes could act as fuel for further damaging fires once it had dried out.[29]
References
- ^ . Retrieved 19 November 2021.
- Peters, James Lee(1927). "Two more remarkable new birds from Cuba". Proceedings of the New England Zoological Club. 9: 95–97.
- ^ Jobling (1992) 66.
- ^ JSTOR 4075353. Archived from the original(PDF) on 2016-03-04. Retrieved 2013-03-30.
- JSTOR 4080492.
- ^ a b c Kirkconnell, Arturo; González, Osmany; Alfaro, Emilio; Cotayo, Lázaro (1999). "Nuevas localidades para la Gallinuela de Santo Tomás Cyanolimnas cerverai y la Ferminia Ferminia cerverai en la Ciénaga de Zapata, Cuba" [New locations of the Zapata Rail Cyanolimnas cerverai and the Zapata Wren Ferminia cerverai in the Zapata Swamp, Cuba] (PDF). Cotinga (in Spanish). 12: 57–60.
- ^ "Recovery of the Ecological Station "Fermin Cervera"". What's New. Ciénaga de Zapata National Park. Retrieved 8 March 2010.
- ^ Taylor & van Perlo (1998) 31.
- ^ a b c d e f Taylor & van Perlo (1998) 435–436.
- ^ Ridgway, Robert; Friedmann, Herbert (1941). "The birds of North and Middle America. Part IX. Family Gruidae—The Cranes, Family Rallidae—The Rails, Coots, and Gallinules Family Heliornithidae—The Sun-grebes, Family Eurypygidae—The Sun-bitterns". Bulletin of the United States National Museum. 50 (9): 1–254.
- ^ a b Raffelle et al. (2003) 58.
- ^ a b c d e f g "Zapata Rail – BirdLife Species Factsheet". BirdLife International. Retrieved 16 April 2011.
- ^ a b Kirkconnell, Arturo. "Zapata Rail (Cyanolimnas cerverai): uplist to Critically Endangered?". BirdLife forum. BirdLife International. Archived from the original on 2014-07-21. Retrieved 13 March 2010.
- ^ Raffelle et al. (2003) 132.
- ^ Raffelle et al. (2003) 192.
- ^ a b Olson, Storrs L (December 1974). "A new species of Nesotrochis from Hispaniola, with notes on other fossil rails from the West Indies (Aves: Rallidae)" (PDF). Proceedings of the Biological Society of Washington. 87 (38): 439–450.
- ^ Bond et al. (2001) 69.
- ^ Taylor & van Perlo (1998) 47.
- ^ Taylor & van Perlo (1998) 39.
- ^ Roots (2006) 61–62.
- ^ Taylor & van Perlo (1998) 34.
- ^ Taylor & van Perlo (1998) 62.
- ^ Fuller (2000) 118–122.
- ^ Kirwan, Guy M; Brinkhuizen, Dušan; Calderón, Diego; Davis, Bradley; Minns, Jeremy (2015). "Neotropical Notebook". Neotropical Birding. 16: 43–62.
- ^ Yu, Yamamoto; Kubota, Satoshi; Ohtani, Kazuhiro; Galano, Tsai Garcia; Soto, Comabella Yamile; Yamaoka, Kosaku (20–24 October 2008). Organoleptic test of Clariid catfish and Japanese surimi products for Cuban people. Proceedings of the 5th World Fisheries Congress. Yokohama, Japan: World Council of Fisheries Societies. pp. 4a 0771 554.
- S2CID 1758547.
- ISBN 978-1-61205-225-0.
- ^ "The Annotated Ramsar List: Cuba". Ramsar. Archived from the original on 2012-02-03. Retrieved 10 March 2010.
- ^ Grogg, Patricia (May 2008). "Climate change-Cuba: Prized Wetland in Danger". IPS News. IPS.
Cited texts
- Bond, James; Eckelberry, Don R; Singer, Arthur B; Poole, Earl L (2001). A Field Guide to Birds of the West Indies. Peterson Field Guides. Houghton Mifflin. ISBN 0-618-00210-3.
- Fuller, Errol (2000). Extinct Birds. Oxford University Press. ISBN 0-19-850837-9.
- Jobling, James A. (1992). A Dictionary of Scientific Bird Names. Oxford University Press. ISBN 0-19-854634-3.
- Raffaele, Herbert A; Wiley, James; Garrido, Orlando H; Keith, Allan R; Raffaele, Janis I (2003). Field Guide to the Birds of the West Indies. Christopher Helm. ISBN 0-7136-5419-8.
- Roots, Clive (2006). Flightless Birds. Greenwood Press. ISBN 0-313-33545-1.
- Taylor, Barry; van Perlo, Ber (2000). Rails. Pica / Christopher Helm. ISBN 1-873403-59-3.
External links
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