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Alde - Ore Estuary
| Location | United Kingdom, East Anglia |
| Central coordinates | 1o 33.37' East 52o 0.27' North |
| IBA criteria | A4i, A4iii, B1i, B2, B3, C2, C3, C4, C6 |
| Area | 2,520 ha |
| Altitude | 0 - 5m |
| Year of IBA assessment | 2007 |
Royal Society for the Protection of Birds
Site description This estuary complex includes the Rivers Alde, Butley and Ore, with Havergate Island, and is of considerable geomorphological interest and important for wintering wildfowl and waders. Orfordness and Havergate Island are also important for breeding gulls and terns.
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| Pied Avocet Recurvirostra avosetta | breeding | 2002 | 166 breeding pairs | good | B3, C6 | Least Concern |
| Pied Avocet Recurvirostra avosetta | passage | 2001-2006 | 831 individuals | good | B1i, B2, C2, C6 | Least Concern |
| Pied Avocet Recurvirostra avosetta | winter | 2001-2006 | 1,157 individuals | good | B1i, B2, C2, C6 | Least Concern |
| Common Redshank Tringa totanus | winter | 2001-2006 | 1,697 individuals | good | B1i, C3 | Least Concern |
| Lesser Black-backed Gull Larus fuscus | breeding | 2001 | 5,790 breeding pairs | good | A4i, B1i, B3, C3 | Least Concern |
| Mediterranean Gull Larus melanocephalus | breeding | 2000 | 6 breeding pairs | good | C6 | Least Concern |
| Common Tern Sterna hirundo | breeding | 2000 | 56 breeding pairs | good | C6 | Least Concern |
| Common Tern Sterna hirundo | breeding | 2006 | 51 breeding pairs | good | C6 | Least Concern |
| Little Tern Sterna albifrons | breeding | 2000 | 88 breeding pairs | good | B2, C6 | Least Concern |
| A4iii Species group - waterbirds | winter | 2001-2006 | 36,777 individuals | good | A4iii, C4 |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| Alde-Ore Estuary | Birds Directive | 2,417 | protected area contained by site | 2,417 |
|
| Alde-Ore Estuary | Site of Special Scientific Interest | 2,534 | protected area overlaps with site | 2,378 |
|
| Alde-Ore Estuary | Wetlands of International Importance (Ramsar) | 2,547 | protected area overlaps with site | 2,376 |
|
| Havergate Island and Boyton Marshes | RSPB Reserve | 377 | protected area overlaps with site | 222 | |
| Suffolk Coast | Heritage Coast | 0 | protected area overlaps with site | 2,385 | |
| Suffolk Coast and Heaths | Area of Outstanding Natural Beauty | 0 | protected area overlaps with site | 2,520 |
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Grassland | - | |
| Wetlands (inland) | Coastal lagoons; Mud flats and sand flats; Rivers and streams; Salt marshes; Shingle or stony beaches; Tidal rivers and enclosed tidal waters; Water fringe vegetation | - |
| Artificial landscapes (terrestrial) | Arable land | - |
Land use
| Land-use | Extent (% of site) |
|---|---|
| agriculture | - |
| nature conservation and research | - |
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Alde - Ore Estuary. Downloaded from http://www.birdlife.org on 23/05/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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