UK040
Medway Estuary and Marshes


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
Northern Pintail Anas acuta LC winter 2001-2006 1,118 individuals B1i, C3
Pied Avocet Recurvirostra avosetta LC passage 2001-2006 576 individuals B2, C6
Pied Avocet Recurvirostra avosetta LC winter 2001-2006 860 individuals B1i, B2, C2, C6
Pied Avocet Recurvirostra avosetta LC breeding 2002 138 breeding pairs C6
Eurasian Curlew Numenius arquata NT winter 2001-2006 1,298 individuals B2
Dunlin Calidris alpina LC winter 2001-2006 7,024 individuals B2
Common Redshank Tringa totanus LC winter 2001-2006 1,537 individuals B1i, C3
Sandwich Tern Thalasseus sandvicensis LC breeding 2006 504 breeding pairs B1i, B2
A4iii Species group - waterbirds n/a winter 2001-2006 25,547 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 high very unfavourable low
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
Energy production and mining renewable energy likely in short term (within 4 years) small area/few individuals (<10%) slow but significant deterioration low
Human intrusions and disturbance recreational activities 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) majority/most of area/population (50-90%) moderate to rapid deterioration high
Natural system modifications other ecosystem modifications happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Pollution agricultural & forestry effluents - nutrient loads happening now small area/few individuals (<10%) no or imperceptible deterioration low
Residential and commercial development commercial and industrial development likely in short term (within 4 years) small area/few individuals (<10%) moderate to rapid deterioration low
Transportation and service corridors shipping lanes likely in short term (within 4 years) small area/few individuals (<10%) moderate to rapid deterioration low

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Branta bernicla Brent Goose 4420 1488 individuals 34 very unfavourable
Tadorna tadorna Common Shelduck 5900 2056 individuals 35 very unfavourable
Anas acuta Northern Pintail 695 1118 individuals 100 favourable
Recurvirostra avosetta Pied Avocet 34 138 breeding pairs 100 favourable
Recurvirostra avosetta Pied Avocet 310 576 individuals 100 favourable
Recurvirostra avosetta Pied Avocet 170 860 individuals 100 favourable
Pluvialis squatarola Grey Plover 3430 749 individuals 22 very unfavourable
Pluvialis squatarola Grey Plover 3690 1272 individuals 35 very unfavourable
Charadrius hiaticula Common Ringed Plover 730 136 individuals 19 very unfavourable
Charadrius hiaticula Common Ringed Plover 1160 122 individuals 11 very unfavourable
Numenius arquata Eurasian Curlew 1960 1298 individuals 67 unfavourable
Limosa limosa Black-tailed Godwit 1310 398 individuals 31 very unfavourable
Arenaria interpres Ruddy Turnstone 1140 298 individuals 27 very unfavourable
Calidris alpina Dunlin 16600 4698 individuals 29 very unfavourable
Calidris alpina Dunlin 27700 7024 individuals 26 very unfavourable
Tringa totanus Common Redshank 5800 1221 individuals 22 very unfavourable
Tringa totanus Common Redshank 3630 1537 individuals 43 unfavourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Whole area of site (>90%) covered by appropriate conservation designation No management plan exists but the management planning process has begun Some limited conservation initiatives are in place low
For more information about IBA monitoring please click here

IBA Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Medway Estuary and Marshes Special Protection Area (Birds Directive) 1,562 is identical to site 4,668
Medway Estuary and Marshes Site of Special Scientific Interest (GB) 4,749 is identical to site 4,668
Medway Estuary & Marshes Ramsar Site, Wetland of International Importance 4,697 is identical to site 4,668

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Grassland Humid grasslands -
Wetlands (inland) Tidal rivers and enclosed tidal waters, Mud flats and sand flats, Salt marshes, Shingle or stony beaches, 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 -
fisheries/aquaculture -
tourism/recreation -
urban/industrial/transport -
For further information about the land use classification please click here.


Recommended citation
BirdLife International (2019) Important Bird Areas factsheet: Medway Estuary and Marshes. Downloaded from http://www.birdlife.org on 17/09/2019.