Birds · Gruiformes · Rallidae

Zapata Rail

Mustelirallus cerverai

Critically Endangered

It faces an extremely high risk of imminent extinction in the wild. See full glossary

The Zapata rail, or gallinuela de Santo Tomás, is a rallid endemic to the Zapata Swamp, the largest wetland in the Caribbean, in southern Cuba. It is practically unable to fly and lives hidden in the densest marsh vegetation. It is one of the most threatened birds in the Caribbean: fewer than a thousand individuals are thought to remain and finding it requires dedicated searches.

Weight

50 g – 70 g

Size

25 cm – 29 cm

Lifespan

8 years

Diet

Omnivore

Combines animal and plant food depending on availability.

Activity

Diurnal

Active mainly during the day.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Sighting difficulty

Very hard

Estimated population

Fewer than 1,000 mature individuals

2countries1parks9same family

Fun facts

  • Its epithet honours Fermín Zanón Cervera, a Spanish soldier who stayed on in Cuba after the Spanish-American War and became a professional naturalist: he was the one who discovered it.
  • Its short wings leave it with almost no power of flight, the same evolutionary fate as so many isolated rails.
  • Barbour and Peters thought it so distinctive that they created a genus of its own for it, Cyanolimnas, from the Greek kuanos, dark blue, and limnas, rail.
  • It is almost unable to fly and lives in a single wetland in the world: the Zapata Swamp, a place that holds several species found nowhere else, among them Fernandina's flicker and a Zapata wren of its own.
  • Its main threats are introduced mongooses and rats and the African catfish, an invasive fish that eats the chicks, as well as the burning of the marsh vegetation.
  • It was discovered in 1927 and for decades there were stretches of years without a single confirmed record, which led on several occasions to fears that it had gone extinct.

Life cycle & biology

Skeleton type
Vertebrate - internal bony skeleton (bird)
Habitat & environment
Freshwater marshes with dense vegetation of the Zapata Swamp, in Cuba
Sexual maturity
12 months
Gestation / incubation
20 days of incubation
Litter / clutch size
3 eggs

Sources consulted: IUCN Red List; DiBird (familia Rallidae); Wikipedia (Zapata rail); Barbour y Peters 1927; IOC World Bird List 2023

Best time: All year round in the Zapata Swamp, though it is extremely hard to see

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Where to watch it

Parks and dive sites where this species has been documented.

Related species

Other species in the catalogue with the most in common with Zapata Rail — same habitat, park, country, tags or family.

How to help

The zapata rail is classified as critically endangered. Organizations such as UICN, WWF y Wildlife Conservation Society work specifically on its conservation and that of its habitat; looking into their programs is a good starting point if you want to get involved.

It's documented in 1 real protected area — part of why protecting these places matters for its conservation.

Keep exploring

Based on what we already know about zapata rail.

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