UK002
Alde - Ore Estuary


IBA Criteria

Year of most recent IBA criteria assessment: 2007

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Pied Avocet Recurvirostra avosetta LC breeding 2002 166 breeding pairs B3, C6
Pied Avocet Recurvirostra avosetta LC passage 2001-2006 831 individuals B1i, B2, C2, C6
Pied Avocet Recurvirostra avosetta LC winter 2001-2006 1,157 individuals B1i, B2, C2, C6
Common Redshank Tringa totanus LC winter 2001-2006 1,697 individuals B1i, C3
Mediterranean Gull Larus melanocephalus LC breeding 2000 6 breeding pairs C6
Lesser Black-backed Gull Larus fuscus LC breeding 2001 5,790 breeding pairs A4i, B1i, B3, C3
Little Tern Sternula albifrons LC breeding 2000 88 breeding pairs B2, C6
Common Tern Sterna hirundo LC breeding 2000 56 breeding pairs C6
Common Tern Sterna hirundo LC breeding 2006 51 breeding pairs C6
A4iii Species group - waterbirds n/a winter 2001-2006 36,777 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 Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2007 medium very unfavourable medium
Was the whole site covered? Yes State assessed by Population
Accuracy of information good

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Climate change and severe weather habitat shifting and alteration happening now some of area/population (10-49%) slow but significant deterioration medium
Human intrusions and disturbance recreational activities likely in short term (within 4 years) some of area/population (10-49%) slow but significant deterioration medium
Human intrusions and disturbance war, civil unrest and military exercises happening now some of area/population (10-49%) slow but significant deterioration medium
Natural system modifications dams & water management/use - small dams likely in short term (within 4 years) small area/few individuals (<10%) slow but significant deterioration low

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Recurvirostra avosetta Pied Avocet 735 1157 individuals 100 favourable
Recurvirostra avosetta Pied Avocet 105 166 breeding pairs 100 favourable
Recurvirostra avosetta Pied Avocet 760 831 individuals 100 favourable
Tringa totanus Common Redshank 1830 1697 individuals 93 favourable
Larus melanocephalus Mediterranean Gull 1 6 breeding pairs 100 favourable
Larus fuscus Lesser Black-backed Gull 8200 5790 breeding pairs 71 near favourable
Sternula albifrons Little Tern 25 88 breeding pairs 100 favourable
Sterna hirundo Common Tern 95 51 breeding pairs 54 unfavourable
Thalasseus sandvicensis Sandwich Tern 300 3 breeding pairs 1 very unfavourable
Species group - waterbirds A4iii 23138 36777 individuals 100 favourable
Species group - waterbirds A4iii 12218 6844 breeding pairs 57 unfavourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Whole area of site (>90%) covered by appropriate conservation designation A management plan exists but it is out of date or not comprehensive Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity medium
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
The Haven, Aldeburgh Local Nature Reserve 20 protected area overlaps with site 0
Suffolk Coast and Heaths Area of Outstanding Natural Beauty 40,510 protected area overlaps with site 2,520
Suffolk Coast Heritage Coast 0 protected area overlaps with site 2,385
Suffolk Heritage Coast 20,697 protected area overlaps with site 0
Snape Warren Site of Special Scientific Interest (UK) 48 protected area overlaps with site 0
Snape Nature Reserve 235 protected area overlaps with site 0
Sandlings Special Protection Area (Birds Directive) 3,406 protected area is adjacent to site 0
Round Hill Pit, Aldeburgh Site of Special Scientific Interest (UK) 1 protected area contained by site 0
Outer Thames Estuary Special Protection Area (Birds Directive) 392,452 protected area is adjacent to site 0
Outer Thames Estuary Marine Protected Area (OSPAR) 0 protected area overlaps with site 0
Orfordness-havergate National Nature Reserve 903 protected area overlaps with site 0
Orfordness - Shingle Street Site of Community Importance (Habitats Directive) 888 protected area overlaps with site 0
Orford Ness Nature Reserve 773 protected area overlaps with site 0
North Warren Nature Reserve 412 protected area overlaps with site 0
Leiston - Aldeburgh Site of Special Scientific Interest (UK) 534 protected area overlaps with site 0
Havergate Island and Boyton Marshes RSPB Reserve 377 protected area overlaps with site 222
Havergate Island & Boyton Marshes Nature Reserve 363 protected area overlaps with site 0
Alde; Ore And Butley Estuaries Site of Community Importance (Habitats Directive) 1,633 protected area contained by site 0
Alde–-Ore Estuary Marine Protected Area (OSPAR) 0 protected area overlaps with site 0
Alde-Ore Estuary Special Protection Area (Birds Directive) 2,404 protected area contained by site 2,417
Alde-Ore Estuary Ramsar Site, Wetland of International Importance 2,547 protected area overlaps with site 2,376
Alde-Ore Estuary Site of Special Scientific Interest (UK) 2,532 protected area overlaps with site 2,378
Alde Ore and Butley Estuaries Marine Protected Area (OSPAR) 0 protected area overlaps with site 0

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Grassland -
Wetlands (inland) Tidal rivers and enclosed tidal waters, Mud flats and sand flats, Salt marshes, Shingle or stony beaches, Coastal lagoons, Rivers and streams, Water fringe vegetation -
Artificial/Terrestrial Arable land -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
agriculture -
nature conservation and research -
For further information about the land use classification please click here.


Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Alde - Ore Estuary. Downloaded from http://www.birdlife.org on 08/08/2022.