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Location Oman, Muscat
Central coordinates 58o 5.00' East  23o 51.00' North
IBA criteria A4i, B1i, B2, B3
Area 20,300 ha
Altitude 0 - 30m
Year of IBA assessment 1994

Site description A group of 13 islands extending westward from Jazirat ad Dimaniyah (23°50'N 58°10'E) to Jazirat Jun (23°50'N 57°59'E), in the Gulf of Oman north-west of As Seeb, with surrounding coral reefs, shoals and rocky outcrops. The islands themselves have a total area of less than 100 ha.

Key Biodiversity See box for key species. The second most important seabird breeding colonies in Oman after the Juzor al Halaaniyaat (site 024). Other breeding species include Phaethon aethereus (6–13 pairs; max. 32 birds offshore in July), Egretta gularis (6 pairs), Pandion haliaetus (min. 4 pairs), Sterna bergii (2+ pairs) and Anous stolidus (c.30 pairs; max. 200 birds offshore, May).

Non-bird biodiversity: Reptiles: sea-turtles Eretmochelys imbricata (E) and Chelonia mydas (E) nest on beaches.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Sooty Falcon Falco concolor breeding  1985  27-35 breeding pairs  good  B2  Near Threatened 
Sooty Gull Larus hemprichii resident  1993  110-200 breeding pairs  good  B3  Least Concern 
Roseate Tern Sterna dougallii breeding  1993  70-135 breeding pairs  good  A4i, B1i, B2  Least Concern 
White-cheeked Tern Sterna repressa breeding  1993  580-1,125 breeding pairs  good  B3  Least Concern 
Bridled Tern Onychoprion anaethetus breeding  1993  6,800-9,300 breeding pairs  good  A4i, B1i  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Ad Dimaniyat Islands Nature Reserve 20,300 is identical to site 20,300  


IUCN habitat Habitat detail Extent (% of site)
Sea   major
Desert   minor
Coastline   minor

Land use

Land-use Extent (% of site)
tourism/recreation minor
fisheries/aquaculture major
nature conservation and research minor
other major
Notes: Exploitation of seabird and sea-turtle eggs for food by fishermen.

Acknowledgements Data-sheet compiled by Simon Albrecht; summary bird data supplied by Oman Bird Records Committee (per Jens Eriksen).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Daymaniyat Islands. Downloaded from on 28/10/2016

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