Introduction

This report presents site trends based on the data gathered by the Irish Wetland Bird Survey (I-WeBS). Only species with sufficient data at Clew Bay (site code 0D405) are presented.

This report is part of the I-WeBS National and Site Trends Report 1994/95 – 2019/20.

For guidance on how to interpret these trends, please see the I-WeBS Trends Report Guidance.

For details on the methods used to generate these trends, please see the I-WeBS Trends Report Methodology.

Site Summary

Trend (%)
Species Clew Bay - 5 Year Clew Bay - 12 Year Clew Bay - 23 Year Long Term Trend
Grey Plover -100.0 -100.0 -100.0 Large Decline
Knot -78.7 -36.8 -75.3 Large Decline
Dunlin -17.0 -20.7 -60.0 Large Decline
Lapwing -43.3 -59.2 -50.0 Large Decline
Turnstone -61.3 -52.9 -31.6 Moderate Decline
Curlew -17.9 -18.7 -28.1 Moderate Decline
Golden Plover 185.7 -44.4 -22.2 Intermediate Decline
Shelduck 7.6 -5.7 -18.2 Intermediate Decline
Mute Swan 10.6 -50.7 -17.0 Intermediate Decline
Ringed Plover -2.5 -12.4 -17.0 Intermediate Decline
Bar-tailed Godwit -44.9 3.4 -4.2 Intermediate Decline
Red-breasted Merganser -14.0 0.0 -3.4 Intermediate Decline
Mallard -8.4 -11.1 1.7 Stable or Increasing
Purple Sandpiper 0.0 -39.8 3.3 Stable or Increasing
Cormorant -29.3 -43.5 8.3 Stable or Increasing
Grey Heron 0.0 -23.3 8.5 Stable or Increasing
Wigeon -3.0 4.0 9.2 Stable or Increasing
Redshank -17.6 -37.2 14.4 Stable or Increasing
Oystercatcher -23.3 -31.3 25.8 Stable or Increasing
Sanderling -57.6 -57.6 48.8 Stable or Increasing
Little Grebe -21.2 25.3 55.2 Stable or Increasing
Teal 30.6 43.8 60.0 Stable or Increasing
Greenshank -4.7 4.3 74.3 Stable or Increasing
Light-bellied Brent Goose -14.1 13.3 97.7 Stable or Increasing
Black-tailed Godwit 2.1 54.0 136.6 Stable or Increasing
Little Egret 88.4 604.3 548.0 Stable or Increasing

Species Analysis

Light-bellied Brent Goose

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -14.1 13.3 97.7
National -11.2 1.2 93.3

Mute Swan

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay 10.6 -50.7 -17.0
National 4.6 9.6 13.8

Shelduck

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay 7.6 -5.7 -18.2
National 6.3 -0.8 9.3

Wigeon

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -3.0 4.0 9.2
National 0.9 -17.0 -18.2

Mallard

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -8.4 -11.1 1.7
National -11.3 -19.7 -19.1

Teal

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay 30.6 43.8 60.0
National 1.8 5.7 19.4

Red-breasted Merganser

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -14.0 0.0 -3.4
National -12.9 5.2 -14.7

Little Grebe

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -21.2 25.3 55.2
National 6.1 16.7 38.2

Oystercatcher

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -23.3 -31.3 25.8
National -17.5 -31.1 10.8

Lapwing

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -43.3 -59.2 -50.0
National -6.5 -45.1 -63.9

Golden Plover

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay 185.7 -44.4 -22.2
National -16.9 -58.1 -54.1

Grey Plover

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -100.0 -100.0 -100.0
National -30.6 -39.4 -57.8

Ringed Plover

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -2.5 -12.4 -17.0
National -4.3 -26.8 -1.1

Curlew

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -17.9 -18.7 -28.1
National -9.4 -23.7 -43.1

Bar-tailed Godwit

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -44.9 3.4 -4.2
National -32.6 -13.9 -5.1

Black-tailed Godwit

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay 2.1 54.0 136.6
National 22.5 25.0 92.3

Turnstone

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -61.3 -52.9 -31.6
National -33.6 -46.0 -23.7

Knot

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -78.7 -36.8 -75.3
National 0.0 -12.2 -9.8

Sanderling

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -57.6 -57.6 48.8
National -23.8 -11.1 84.6

Dunlin

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -17.0 -20.7 -60.0
National 5.9 -21.2 -45.2

Purple Sandpiper

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay 0.0 -39.8 3.3
National -36.4 -37.6 23.5

Redshank

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -17.6 -37.2 14.4
National -14.0 -28.4 6.7

Greenshank

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -4.7 4.3 74.3
National 0.9 7.3 41.0

Cormorant

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay -29.3 -43.5 8.3
National 38.5 8.4 42.9

Grey Heron

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay 0.0 -23.3 8.5
National 1.0 -4.9 6.6

Little Egret

Trend (%)
Site 5 Year 12 Year 23 Year
Clew Bay 88.4 604.3 548.0
National 34.6 61.5 483.3

Citations

Please cite this work as follows:

Kennedy, J., Burke, B., Fitzgerald, N., Kelly, S.B.A., Walsh, A.J. & Lewis, L.J. 2022. Irish Wetland Bird Survey: I-WeBS National and Site Trends Report 1994/95 – 2019/20. BirdWatch Ireland Waterbird Report to the National Parks and Wildlife Service. BirdWatch Ireland, Wicklow. (https://birdwatchireland.ie/app/uploads/2022/04/iwebs_trends_report.html)