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Location Cayman Islands (to UK), Grand Cayman
Central coordinates 81o 11.00' West  19o 19.00' North
IBA criteria A1, A2
Area 446 ha
Altitude 0 - 18m
Year of IBA assessment 2007

Site description The site lies inland on North Side, bounded on the west and south by KY006, the Central Mangrove Wetland, and to the north by agricultural land. The dry forest has bothprimary- and second-growth trees with areas of grassland once used for agriculture. It comprises the largest area of contiguous dry forest in the Cayman Islands, with thehighest degree of endemism and biodiversity, having been above the sea for 2 to 2.5 million years; it also includes the highest elevation on Grand Cayman (18 m). It has retained its pristine nature because there is no road access; only two footpaths bisect the site. Dominant trees are as characterised in the general introduction to this chapter; rare species mainly confined to this site are Casearia sp. nov., Daphnopsis occidentalis, Sideroxylon foetidissimum, Terminalia eriostachya, Celtis trinervia, Jacquininia sp. nov., Jatropha divaricata, Dendropanax arboreus and Xylosoma bahamsense. It is floristically distinct from Cayman Brac and Little Cayman and, due to slight variations in elevation and the high water table, there are distinct vegetation zones of differing tree heights. The Mastic trail, a 2.5-mile traditional footpath and public right of way from north to south, was opened for tourism in 1994 with a grant from the RARE Centre for Tropical Conservation.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
White-crowned Pigeon Patagioenas leucocephala resident  2007  unknown  A1  Near Threatened 
Cuban Amazon Amazona leucocephala resident  2005  25-350 individuals  poor  A1  Near Threatened 
Caribbean Elaenia Elaenia martinica resident  2005  unknown  A2  Least Concern 
Thick-billed Vireo Vireo crassirostris resident  2005  unknown  A2  Least Concern 
Yucatan Vireo Vireo magister resident  2005  unknown  A2  Least Concern 
Vitelline Warbler Dendroica vitellina resident  2005  unknown  A1, A2  Near Threatened 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Mastic Reserve (Grand Cayman) Reserve 162 protected area overlaps with site 172  


IUCN habitat Habitat detail Extent (% of site)
Forest Mangrove  major
Grassland   minor

Land use

Land-use Extent (% of site)
not utilised -
nature conservation and research -
agriculture minor

Other biodiversity Plants endemic to the Cayman Islands: Allophylus cominia var. caymanensis. Plants endemic to Grand Cayman: Casearia sp., Chionanthus caymanensis var. longipetala, Daphnopsis occidentalis, Crossopetalum caymanense, Myrmecophilia thompsoniana thompsonia, Dendrophylax fawcettii, Tolumnia caymanense, Jatropha divaricata and Dendropanax arboreus. Reptiles endemic to Grand Cayman: Anolis conspersus conspersus, Sphaerodactylus argivus lewisi, Tropidophis caymanensis caymanensis and Alsophis cantherigerus caymanensis. Lepidoptera endemic to the Cayman Islands: Cyclargus ammon erembis, Dryas iulia zoe (with Cayman Brac)and Memphis echemus danielana. Endemic to Grand Cayman: Heraclides andraemon tailori and Brephidium exilis thompsoni.

Protection status 44% of the site is protected by the National Trust

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 (2014) Important Bird Areas factsheet: Mastic Reserve. Downloaded from on 17/09/2014

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