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Location United Kingdom, Channel Islands
Central coordinates 2o 17.50' West  49o 43.45' North
IBA criteria B2
Area 1 ha
Altitude 0 - 24m
Year of IBA assessment 2007

Royal Society for the Protection of Birds

Site description A Cambrian sandstone rock located 4.5 km off the west coast of Alderney. The site supports the smaller of two gannetries in the Channel Islands.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Northern Gannet Morus bassanus breeding  1998-2000  2,500 breeding pairs  good  B2  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Alderney West Coast and the Burhou Islands Wetlands of International Importance (Ramsar) 15,629 protected area contains site 1  


IUCN habitat Habitat detail Extent (% of site)
Coastline Rock stacks and islets  100%

Land use

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

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Ortac, Alderney. Downloaded from on 20/10/2014

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