Shannon and Fergus Estuaries

IBA Criteria

Year of most recent IBA criteria assessment: 2009

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Whooper Swan Cygnus cygnus LC winter 2002-2006 125-337 individuals B1i, B3, C2
A4iii Species group - waterbirds n/a winter 2002-2006 13,298-43,611 individuals A4iii, C4

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
River Shannon and River Fergus Estuaries SPA Special Protection Area (Birds Directive) 32,238 protected area overlaps with site 14,519
Lower River Shannon SAC Site of Community Importance (Habitats Directive) 68,300 protected area contains site 16,718


IUCN Habitat Habitat detail Extent (% of site)
Grassland Humid grasslands -
Wetlands (inland) Rivers and streams, Water fringe vegetation -
Coastline Tidal rivers & enclosed tidal waters, Salt marshes, Mud flats & sand flats -
Marine Neritic -
Marine Intertidal -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
agriculture -
fisheries/aquaculture -
urban/industrial/transport -
hunting -
tourism/recreation -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Shannon and Fergus Estuaries. Downloaded from on 01/04/2023.