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The site was identified as important in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Red-necked Grebe Podiceps grisegena	LC	passage	2003	100-550 individuals	A4i
Sandwich Tern Thalasseus sandvicensis	LC	breeding	2003-2004	2,000-2,500 individuals	A4i
A4iii Species group - waterbirds	n/a	passage	2004	20,000-49,999 individuals	A4iii

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2004) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2018) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Mute Swan Cygnus olor	6,075	25,354	individuals	100	favourable
Long-tailed Duck Clangula hyemalis	1	900	individuals	100	favourable
Common Goldeneye Bucephala clangula	496	4,692	individuals	100	favourable
Red-crested Pochard Netta rufina	1,855	57,000	individuals	100	favourable
Common Pochard Aythya ferina	395	100	individuals	26	very unfavourable
Tufted Duck Aythya fuligula	670	650	individuals	98	favourable
Mallard Anas platyrhynchos	2	300	individuals	100	favourable
Mew Gull Larus canus	1	10	individuals	100	favourable
Caspian Gull Larus cachinnans	1,710	83	individuals	5	very unfavourable
Hen Harrier Circus cyaneus	1	1	individuals	100	favourable
White-tailed Sea-eagle Haliaeetus albicilla	2	19	individuals	100	favourable

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Unknown	Unknown	Unknown	negligible

Year	Protected Area	Designation	% overlap with IBA
1978	Northen Part of Caspian Sea	State Reservation	100

Habitat1	Habitat detail	% of IBA
Wetlands (inland)	Standing brackish & salt water, Rivers & streams, Water-fringe vegetation, Standing fresh water, Temporary water bodies	90
Desert		10

1. IUCN Habitat classification.

Land use	% of IBA
nature conservation and research	100
military	5

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tyulen’i (Seal) Islands (Kazakhstan). Downloaded from https://datazone.birdlife.org/site/factsheet/tyulen’i-(seal)-islands-iba-kazakhstan on 23/11/2024.