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Location Virgin Islands (to UK)
Central coordinates 64o 42.50' West  18o 27.21' North
IBA criteria A2, A4i
Area 425 ha
Altitude 0 - 30m
Year of IBA assessment 2007

Site description Green Cay is a small six hectare volcanic island comprised of igneous bedrock reaching a maximum elevation of 30m, covered in xerophytic coastal scrub. The island is currently privately owned and is a proposed protected areas to be included within the system of national parks.

Key Biodiversity Green Cay is an important nesting site for the Roseate Tern. In 1996, a total of 1755 Roseate Terns, were counted making Green Cay the largest breeding colony in the US and British Virgin Islands.

Non-bird biodiversity: The terrestrial vertebrate fauna on Green Cay is limited to a few species of common lizard, primarily Anoles.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Roseate Tern Sterna dougallii breeding  2005  1,755 individuals  poor  A4i  Least Concern 
Green-throated Carib Eulampis holosericeus resident  2007  unknown  A2  Least Concern 
Caribbean Elaenia Elaenia martinica resident  2008  unknown  A2  Least Concern 
Puerto Rican Flycatcher Myiarchus antillarum resident  2007  unknown  A2  Least Concern 
Pearly-eyed Thrasher Margarops fuscatus resident  2007  unknown  A2  Least Concern 


IUCN habitat Habitat detail Extent (% of site)
Coastline Sea cliffs and rocky shores  major
Shrubland Scrub  major

Land use

Land-use Extent (% of site)
not utilised -

Further web sources of information 

Site profile from Important Bird Areas in the Caribbean: key sites for conservation (BirdLife International 2008)

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Green Cay. Downloaded from on 23/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife