Introduction
The Cozumel Emerald, Cynanthus forficatus, is a small hummingbird endemic to Cozumel Island, off the eastern coast of Mexico’s Yucatán Peninsula. It is a year-round resident and one of the island’s most distinctive birds. The species was formerly placed in the genus Chlorostilbon, and that name still appears in some conservation and park documents.
Physical Description
The Cozumel Emerald measures approximately 8–10 cm in length. It has a short, straight bill, dark wings and a long, deeply forked tail. The species shows clear sexual dimorphism.
Adult males are predominantly bright, metallic emerald-green, with a golden-green crown and a red bill tipped with black. Their blue-black tail is particularly long and deeply forked, giving the species its distinctive appearance.
Females are duller overall. They have green upperparts, pale greyish underparts, a dark facial mask and a noticeable white stripe behind the eye. Their tail is shorter than the male’s but remains distinctly forked, with contrasting white and dark markings on the outer feathers. Immature birds resemble females more closely than adult males.
Range and Habitat
The Cozumel Emerald is endemic to Cozumel Island, where it is a non-migratory resident. It occurs in low deciduous forest, woodland, scrub, second growth, mangroves, forest edges and gardens. It is also found in semi-open areas with flowering plants, including some disturbed habitats.
Although Cozumel is the species’ principal range, isolated records from nearby islands have been reported. These records do not alter its status as a Cozumel endemic for practical identification and conservation purposes.
The species uses a wide range of flowering plants for nectar and may be encountered from low vegetation to the forest canopy. Its ability to use gardens and habitat edges can bring it close to settlements and visitor facilities, provided suitable vegetation remains available.
Where to See This Species
Parque Ecoturístico Punta Sur, Quintana Roo, Mexico
The Cozumel Emerald has been documented during systematic bird monitoring at Punta Sur. The park contains coastal scrub, forest, lagoon systems and other native vegetation that provide suitable feeding habitat. Look around flowering plants, forest edges and quieter sections of the observation trails, particularly during the morning.
Nearby accommodation: San Miguel de Cozumel is the nearest practical base, with hotels, guest houses, self-catering accommodation and resort areas.
Área de Protección de Flora y Fauna Cenote Aerolito, Quintana Roo, Mexico
The Cozumel Emerald is listed among the resident birds recorded for the Cenote Aerolito protected area. The reserve’s forested surroundings and native vegetation make it a suitable place to watch for hummingbirds around clearings, flowering plants and the margins of the access paths. Access conditions and any visitor requirements should be checked locally before travelling.
Nearby accommodation: San Miguel de Cozumel provides the main choice of hotels, guest houses, apartments and other visitor accommodation.
Parque Nacional Arrecifes de Cozumel, Quintana Roo, Mexico
The national park includes protected coastal habitats and terrestrial vegetation on and around the southern and western parts of Cozumel. The Cozumel Emerald is listed among the birds associated with the protected area. Birdwatchers should concentrate on coastal scrub, forest margins and vegetated paths rather than the reef itself.
Nearby accommodation: San Miguel de Cozumel is the principal gateway, with accommodation ranging from hotels and resorts to guest houses and self-catering properties.
Behaviour and Diet
The Cozumel Emerald is active and highly manoeuvrable, using rapid wingbeats to hover while feeding. It may move between flowering plants on regular feeding routes and can defend particularly productive flowers from other hummingbirds.
Nectar forms the main part of its diet. The species also takes small insects and other arthropods, which provide additional protein and nutrients. Its visits to flowers make it an important pollinator of plants in Cozumel’s forests, scrub, gardens and coastal habitats.
Detailed information about the species’ breeding season, nest construction and reproductive behaviour remains limited. As with other hummingbirds, females are expected to undertake most or all nest-building and chick-rearing duties, but species-specific information should be treated cautiously.
Identification Tips
- Look for a small, slim hummingbird with a conspicuously forked tail.
- Adult males are brilliant emerald-green, with a golden-green crown and a red-and-black-tipped bill.
- Females are paler below and show a dark facial mask, a white stripe behind the eye and a shorter, still-forked tail.
- On Cozumel, the Cozumel Emerald is the only regularly occurring hummingbird with this combination of a bright green body and deeply forked tail.
- Canivet’s Emerald occurs on the Yucatán mainland but is not the expected hummingbird on Cozumel. The Cozumel Emerald’s especially long, deeply forked tail is a useful distinction when comparing the two species.
Conservation Status
The Cozumel Emerald is currently assessed as Least Concern on the IUCN Red List. The available assessment describes the population as stable and does not identify an immediate global threat requiring a higher category.
Nevertheless, its extremely restricted island range makes habitat protection important. Clearing of native vegetation, poorly planned development, loss of flowering plants and severe hurricanes could reduce local feeding and nesting habitat. Protected areas, native planting, environmental monitoring and careful management of tourism infrastructure all contribute to the species’ long-term security.
The former Near Threatened description in the original article is not supported by the current IUCN assessment and has therefore been corrected.
Frequently Asked Questions
Where is the Cozumel Emerald found?
It is endemic to Cozumel Island in Quintana Roo, Mexico. It is a resident species and does not undertake regular long-distance migration.
How can you identify a male Cozumel Emerald?
The male is a small, bright emerald-green hummingbird with a golden-green crown, a red bill tipped with black and a long, deeply forked blue-black tail.
How can you identify a female Cozumel Emerald?
The female has green upperparts, pale greyish underparts, a dark facial mask, a white stripe behind the eye and a shorter forked tail with contrasting dark and white markings.
What does the Cozumel Emerald eat?
It feeds mainly on flower nectar and also takes small insects and other arthropods. It visits flowering plants in forest, scrub, mangroves, gardens and other semi-open habitats.
Is the Cozumel Emerald endangered?
It is currently classified as Least Concern by the IUCN. Its restricted island range means that habitat loss and severe storms should still be monitored carefully.
Where is the best place to look for this hummingbird?
Punta Sur, Cenote Aerolito and suitable coastal or forest-edge habitats within the Parque Nacional Arrecifes de Cozumel are documented places to look. Flowering plants, gardens, scrub and quiet forest margins are generally more promising than dense, unflowering forest.
References
- IUCN Red List of Threatened Species
- IOC World Bird List
- Comisión Nacional de Áreas Naturales Protegidas
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