CR

Zapata Rail

Cyanolimnas cerverai

Declining

Overview

The Zapata rail is a medium-sized, dark-coloured rail. It has brown upperparts, greyish-blue underparts, a red-based yellow bill, white undertail coverts, and red eyes and legs. Its short wings render it almost flightless. It is endemic to the wetlands of the Zapata Peninsula in southern Cuba, where its only known nest was found in sawgrass tussocks. Little is known of its diet or reproductive behaviour, and its described calls may belong to a different species.

The Zapata Rail faces severe threats from habitat destruction within its extremely limited range in Cuba's Zapata Swamp. Invasive species, particularly feral pigs and exotic plants, degrade the pristine wetland conditions this flightless rail requires. Climate change poses an existential threat through sea-level rise and altered precipitation patterns that could eliminate the species' entire habitat. Human disturbance from tourism and research activities in this small, fragmented population adds additional pressure to an already precarious situation.

Threat summary

Habitat

The Zapata Rail is endemic to the Zapata Swamp in Cuba, inhabiting dense sawgrass marshes and wet prairies with scattered shrubs. This flightless species requires pristine freshwater wetlands with specific water levels and native vegetation structure for foraging and nesting.

Grassland· majorWetlands (inland) - Bogs, marshes, swamps, fens· major

Conservation measures underway

Site/area managementSpecies recovery

Frequently asked questions

Why is Zapata Rail classified as Critically Endangered?
Zapata Rail is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. The Zapata Rail faces severe threats from habitat destruction within its extremely limited range in Cuba's Zapata Swamp. Invasive species, particularly feral pigs and exotic plants, degrade the pristine wetland conditions this flightless rail requires. Climate change poses an existential threat through sea-level rise and altered precipitation patterns that could eliminate the species' entire habitat. Human disturbance from tourism and research activities in this small, fragmented population adds additional pressure to an already precarious situation.
Where does Zapata Rail live?
Zapata Rail occurs in Cuba. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Zapata Rail?
The main threats to Zapata Rail are 7.1, 8.1, ai-1, and ai-2. The full IUCN-classified threat record for this species is detailed on the species page.

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