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The site was identified as important in 2017 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):

Species	Current IUCN Red List Category	Season	Year(s)	Population estimate at site	IBA criteria met
Socotra Cormorant Phalacrocorax nigrogularis	VU	breeding	2005-2017	1,600-4,000 breeding pairs	A1, A4, B3a
Sooty Gull Larus hemprichii	LC	breeding	2005-2017	20-35 breeding pairs	B2a
Bridled Tern Onychoprion anaethetus	LC	breeding	2005-2017	6,000 breeding pairs	A4, B3a
White-cheeked Tern Sterna repressa	LC	breeding	2005-2017	1,100-2,600 breeding pairs	A4, B2a, B3a
Lesser Crested Tern Thalasseus bengalensis	LC	breeding	2003-2017	6,000-8,000 breeding pairs	A4, B3a
A4iii Species group - waterbirds	n/a	breeding	2005-2017	14,720-20,635 breeding pairs	B3b

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2017).

State (condition of the trigger species' populations)
Scientific name	Common name	Reference population	Actual population	Units	% of population remaining	Result
Phalacrocorax nigrogularis	Socotra Cormorant	2500	2000	breeding pairs	80	near favourable
Onychoprion anaethetus	Bridled Tern	6000	6000	breeding pairs	100	favourable
Sterna repressa	White-cheeked Tern	2000	1750	breeding pairs	88	near favourable
Thalasseus bengalensis	Lesser Crested Tern	7000	7000	breeding pairs	100	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat level 1	Threat level 2	Timing	Scope	Severity	Result
Human intrusions and disturbance	recreational activities	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low
Residential and commercial development	housing and urban areas	past (and unlikely to return) and no longer limiting	small area/few individuals (<10%)	very rapid to severe deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation	Management planning	Other conservation action	Result
Little/none of site covered (<10%)	No management planning has taken place	Very little or no conservation action taking place	negligible

For more information about IBA conservation status, please click here

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Marine Intertidal		-
Marine Neritic		-
Marine Coastal/Supratidal		-

For more information about the IUCN Habitat classification, please click here.

Land-use	Extent (% of site)
military	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Dayyinah Island (Diynah). Downloaded from http://datazone.birdlife.org/site/factsheet/dayyinah-island-(diynah)-iba-united-arab-emirates on 23/09/2023.