Introduction

This report presents national trends based on the data gathered by the Irish Wetland Bird Survey (I-WeBS). Only species with sufficient data 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.

National Summary

Trend (%)
Species National - 5 Year National - 12 Year National - 23 Year Long Term Trend
Scaup -33.6 -82.9 -89.2 Large Decline
Pochard -19.8 -60.4 -79.1 Large Decline
Goldeneye -32.5 -39.0 -66.9 Large Decline
Lapwing -6.5 -45.1 -63.9 Large Decline
Grey Plover -30.6 -39.4 -57.8 Large Decline
Golden Plover -16.9 -58.1 -54.1 Large Decline
Dunlin 5.9 -21.2 -45.2 Moderate Decline
Curlew -9.4 -23.7 -43.1 Moderate Decline
Turnstone -33.6 -46.0 -23.7 Intermediate Decline
Coot -10.1 1.1 -23.2 Intermediate Decline
Mallard -11.3 -19.7 -19.1 Intermediate Decline
Wigeon 0.9 -17.0 -18.2 Intermediate Decline
Tufted Duck -20.7 -28.9 -17.9 Intermediate Decline
Red-breasted Merganser -12.9 5.2 -14.7 Intermediate Decline
Pintail -0.8 -6.0 -13.7 Intermediate Decline
Great Crested Grebe -39.5 -6.1 -10.8 Intermediate Decline
Shoveler 23.0 -21.3 -10.8 Intermediate Decline
Knot 0.0 -12.2 -9.8 Intermediate Decline
Bar-tailed Godwit -32.6 -13.9 -5.1 Intermediate Decline
Ringed Plover -4.3 -26.8 -1.1 Intermediate Decline
Grey Heron 1.0 -4.9 6.6 Stable or Increasing
Redshank -14.0 -28.4 6.7 Stable or Increasing
Shelduck 6.3 -0.8 9.3 Stable or Increasing
Oystercatcher -17.5 -31.1 10.8 Stable or Increasing
Mute Swan 4.6 9.6 13.8 Stable or Increasing
Teal 1.8 5.7 19.4 Stable or Increasing
Purple Sandpiper -36.4 -37.6 23.5 Stable or Increasing
Gadwall -26.5 4.3 24.4 Stable or Increasing
Little Grebe 6.1 16.7 38.2 Stable or Increasing
Greenshank 0.9 7.3 41.0 Stable or Increasing
Cormorant 38.5 8.4 42.9 Stable or Increasing
Sanderling -23.8 -11.1 84.6 Stable or Increasing
Black-tailed Godwit 22.5 25.0 92.3 Stable or Increasing
Light-bellied Brent Goose -11.2 1.2 93.3 Stable or Increasing
Little Egret 34.6 61.5 483.3 Stable or Increasing

Species Analysis

Light-bellied Brent Goose

Trend (%)
Site 5 Year 12 Year 23 Year
National -11.2 1.2 93.3

Mute Swan

Trend (%)
Site 5 Year 12 Year 23 Year
National 4.6 9.6 13.8

Shelduck

Trend (%)
Site 5 Year 12 Year 23 Year
National 6.3 -0.8 9.3

Shoveler

Trend (%)
Site 5 Year 12 Year 23 Year
National 23.0 -21.3 -10.8

Gadwall

Trend (%)
Site 5 Year 12 Year 23 Year
National -26.5 4.3 24.4

Wigeon

Trend (%)
Site 5 Year 12 Year 23 Year
National 0.9 -17.0 -18.2

Mallard

Trend (%)
Site 5 Year 12 Year 23 Year
National -11.3 -19.7 -19.1

Pintail

Trend (%)
Site 5 Year 12 Year 23 Year
National -0.8 -6.0 -13.7

Teal

Trend (%)
Site 5 Year 12 Year 23 Year
National 1.8 5.7 19.4

Pochard

Trend (%)
Site 5 Year 12 Year 23 Year
National -19.8 -60.4 -79.1

Tufted Duck

Trend (%)
Site 5 Year 12 Year 23 Year
National -20.7 -28.9 -17.9

Scaup

Trend (%)
Site 5 Year 12 Year 23 Year
National -33.6 -82.9 -89.2

Goldeneye

Trend (%)
Site 5 Year 12 Year 23 Year
National -32.5 -39.0 -66.9

Red-breasted Merganser

Trend (%)
Site 5 Year 12 Year 23 Year
National -12.9 5.2 -14.7

Coot

Trend (%)
Site 5 Year 12 Year 23 Year
National -10.1 1.1 -23.2

Little Grebe

Trend (%)
Site 5 Year 12 Year 23 Year
National 6.1 16.7 38.2

Great Crested Grebe

Trend (%)
Site 5 Year 12 Year 23 Year
National -39.5 -6.1 -10.8

Oystercatcher

Trend (%)
Site 5 Year 12 Year 23 Year
National -17.5 -31.1 10.8

Lapwing

Trend (%)
Site 5 Year 12 Year 23 Year
National -6.5 -45.1 -63.9

Golden Plover

Trend (%)
Site 5 Year 12 Year 23 Year
National -16.9 -58.1 -54.1

Grey Plover

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

Ringed Plover

Trend (%)
Site 5 Year 12 Year 23 Year
National -4.3 -26.8 -1.1

Curlew

Trend (%)
Site 5 Year 12 Year 23 Year
National -9.4 -23.7 -43.1

Bar-tailed Godwit

Trend (%)
Site 5 Year 12 Year 23 Year
National -32.6 -13.9 -5.1

Black-tailed Godwit

Trend (%)
Site 5 Year 12 Year 23 Year
National 22.5 25.0 92.3

Turnstone

Trend (%)
Site 5 Year 12 Year 23 Year
National -33.6 -46.0 -23.7

Knot

Trend (%)
Site 5 Year 12 Year 23 Year
National 0.0 -12.2 -9.8

Sanderling

Trend (%)
Site 5 Year 12 Year 23 Year
National -23.8 -11.1 84.6

Dunlin

Trend (%)
Site 5 Year 12 Year 23 Year
National 5.9 -21.2 -45.2

Purple Sandpiper

Trend (%)
Site 5 Year 12 Year 23 Year
National -36.4 -37.6 23.5

Redshank

Trend (%)
Site 5 Year 12 Year 23 Year
National -14.0 -28.4 6.7

Greenshank

Trend (%)
Site 5 Year 12 Year 23 Year
National 0.9 7.3 41.0

Cormorant

Trend (%)
Site 5 Year 12 Year 23 Year
National 38.5 8.4 42.9

Grey Heron

Trend (%)
Site 5 Year 12 Year 23 Year
National 1.0 -4.9 6.6

Little Egret

Trend (%)
Site 5 Year 12 Year 23 Year
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)