I-WeBS Dundalk Bay Trends Report
I-WeBS Trends Report 1994/95 – 2019/20
Published 2022-04-01
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 Dundalk Bay (site code 0Z401) 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
| Species | Dundalk Bay - 5 Year | Dundalk Bay - 12 Year | Dundalk Bay - 23 Year | Long Term Trend |
|---|---|---|---|---|
| Sanderling | -98.4 | -5.9 | -75.4 | Large Decline |
| Scaup | -39.0 | 163.5 | -53.9 | Large Decline |
| Shoveler | -75.3 | 39.5 | -48.2 | Moderate Decline |
| Knot | -33.0 | -22.5 | -42.7 | Moderate Decline |
| Dunlin | 31.5 | -26.0 | -39.1 | Moderate Decline |
| Goldeneye | -51.3 | 81.9 | -38.8 | Moderate Decline |
| Great Crested Grebe | 110.1 | 0.6 | -36.4 | Moderate Decline |
| Lapwing | -9.5 | -21.1 | -36.4 | Moderate Decline |
| Red-breasted Merganser | -43.5 | -18.6 | -32.4 | Moderate Decline |
| Curlew | 19.1 | -1.8 | -25.3 | Moderate Decline |
| Grey Plover | -18.8 | 64.7 | -15.2 | Intermediate Decline |
| Shelduck | 3.2 | -42.1 | -15.2 | Intermediate Decline |
| Mallard | -25.9 | -29.3 | -14.0 | Intermediate Decline |
| Wigeon | 21.1 | -26.6 | -6.1 | Intermediate Decline |
| Bar-tailed Godwit | -32.6 | -23.6 | 0.0 | Stable or Increasing |
| Golden Plover | -14.5 | -50.4 | 0.0 | Stable or Increasing |
| Mute Swan | 84.2 | 7.1 | 1.9 | Stable or Increasing |
| Oystercatcher | -10.5 | -50.2 | 2.3 | Stable or Increasing |
| Greenshank | -0.9 | -28.8 | 12.9 | Stable or Increasing |
| Grey Heron | 29.5 | -2.9 | 14.8 | Stable or Increasing |
| Ringed Plover | -30.9 | -51.5 | 15.3 | Stable or Increasing |
| Redshank | -9.7 | -47.9 | 17.8 | Stable or Increasing |
| Turnstone | -46.1 | -24.1 | 22.4 | Stable or Increasing |
| Pintail | 17.2 | -36.4 | 25.4 | Stable or Increasing |
| Cormorant | 47.2 | -46.2 | 39.5 | Stable or Increasing |
| Teal | 28.1 | -38.0 | 46.2 | Stable or Increasing |
| Light-bellied Brent Goose | -7.4 | 89.9 | 206.1 | Stable or Increasing |
| Little Grebe | -49.8 | -50.6 | 228.6 | Stable or Increasing |
| Black-tailed Godwit | 8.0 | -3.3 | 228.9 | Stable or Increasing |
| Little Egret | 37.8 | 187.2 | 938.5 | Stable or Increasing |
Species Analysis
Light-bellied Brent Goose
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -7.4 | 89.9 | 206.1 |
| National | -11.2 | 1.2 | 93.3 |
Mute Swan
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 84.2 | 7.1 | 1.9 |
| National | 4.6 | 9.6 | 13.8 |
Shelduck
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 3.2 | -42.1 | -15.2 |
| National | 6.3 | -0.8 | 9.3 |
Shoveler
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -75.3 | 39.5 | -48.2 |
| National | 23.0 | -21.3 | -10.8 |
Wigeon
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 21.1 | -26.6 | -6.1 |
| National | 0.9 | -17.0 | -18.2 |
Mallard
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -25.9 | -29.3 | -14.0 |
| National | -11.3 | -19.7 | -19.1 |
Pintail
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 17.2 | -36.4 | 25.4 |
| National | -0.8 | -6.0 | -13.7 |
Teal
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 28.1 | -38.0 | 46.2 |
| National | 1.8 | 5.7 | 19.4 |
Scaup
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -39.0 | 163.5 | -53.9 |
| National | -33.6 | -82.9 | -89.2 |
Goldeneye
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -51.3 | 81.9 | -38.8 |
| National | -32.5 | -39.0 | -66.9 |
Red-breasted Merganser
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -43.5 | -18.6 | -32.4 |
| National | -12.9 | 5.2 | -14.7 |
Little Grebe
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -49.8 | -50.6 | 228.6 |
| National | 6.1 | 16.7 | 38.2 |
Great Crested Grebe
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 110.1 | 0.6 | -36.4 |
| National | -39.5 | -6.1 | -10.8 |
Oystercatcher
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -10.5 | -50.2 | 2.3 |
| National | -17.5 | -31.1 | 10.8 |
Lapwing
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -9.5 | -21.1 | -36.4 |
| National | -6.5 | -45.1 | -63.9 |
Golden Plover
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -14.5 | -50.4 | 0.0 |
| National | -16.9 | -58.1 | -54.1 |
Grey Plover
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -18.8 | 64.7 | -15.2 |
| National | -30.6 | -39.4 | -57.8 |
Ringed Plover
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -30.9 | -51.5 | 15.3 |
| National | -4.3 | -26.8 | -1.1 |
Curlew
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 19.1 | -1.8 | -25.3 |
| National | -9.4 | -23.7 | -43.1 |
Bar-tailed Godwit
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -32.6 | -23.6 | 0.0 |
| National | -32.6 | -13.9 | -5.1 |
Black-tailed Godwit
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 8.0 | -3.3 | 228.9 |
| National | 22.5 | 25.0 | 92.3 |
Turnstone
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -46.1 | -24.1 | 22.4 |
| National | -33.6 | -46.0 | -23.7 |
Knot
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -33.0 | -22.5 | -42.7 |
| National | 0.0 | -12.2 | -9.8 |
Sanderling
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -98.4 | -5.9 | -75.4 |
| National | -23.8 | -11.1 | 84.6 |
Dunlin
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 31.5 | -26.0 | -39.1 |
| National | 5.9 | -21.2 | -45.2 |
Redshank
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -9.7 | -47.9 | 17.8 |
| National | -14.0 | -28.4 | 6.7 |
Greenshank
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | -0.9 | -28.8 | 12.9 |
| National | 0.9 | 7.3 | 41.0 |
Cormorant
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 47.2 | -46.2 | 39.5 |
| National | 38.5 | 8.4 | 42.9 |
Grey Heron
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 29.5 | -2.9 | 14.8 |
| National | 1.0 | -4.9 | 6.6 |
Little Egret
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Dundalk Bay | 37.8 | 187.2 | 938.5 |
| 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)