I-WeBS Croagh 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 Croagh Bay (site code 0L925) 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 | Croagh Bay - 5 Year | Croagh Bay - 12 Year | Croagh Bay - 23 Year | Long Term Trend |
|---|---|---|---|---|
| Dunlin | -84.6 | -79.1 | -85.1 | Large Decline |
| Lapwing | -76.6 | -70.2 | -84.8 | Large Decline |
| Turnstone | -74.2 | -50.4 | -40.0 | Moderate Decline |
| Mute Swan | -10.5 | -10.5 | -26.7 | Moderate Decline |
| Shelduck | 27.0 | 24.8 | -0.7 | Stable or Increasing |
| Curlew | -18.5 | 51.4 | 8.2 | Stable or Increasing |
| Red-breasted Merganser | -1.0 | 131.8 | 12.1 | Stable or Increasing |
| Grey Heron | -36.3 | 42.5 | 28.0 | Stable or Increasing |
| Redshank | -20.3 | -17.8 | 43.2 | Stable or Increasing |
| Cormorant | 8.8 | 92.2 | 78.3 | Stable or Increasing |
| Mallard | -22.8 | 251.9 | 90.0 | Stable or Increasing |
| Teal | 39.8 | 52.8 | 106.2 | Stable or Increasing |
| Greenshank | -8.4 | 84.9 | 113.0 | Stable or Increasing |
| Oystercatcher | 7.9 | 140.0 | 140.0 | Stable or Increasing |
| Little Egret | -24.7 | 108.8 | 205.1 | Stable or Increasing |
| Wigeon | 100.0 | 423.8 | 205.6 | Stable or Increasing |
| Little Grebe | 56.1 | 345.0 | 304.5 | Stable or Increasing |
Species Analysis
Mute Swan
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -10.5 | -10.5 | -26.7 |
| National | 4.6 | 9.6 | 13.8 |
Shelduck
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | 27.0 | 24.8 | -0.7 |
| National | 6.3 | -0.8 | 9.3 |
Wigeon
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | 100.0 | 423.8 | 205.6 |
| National | 0.9 | -17.0 | -18.2 |
Mallard
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -22.8 | 251.9 | 90.0 |
| National | -11.3 | -19.7 | -19.1 |
Teal
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | 39.8 | 52.8 | 106.2 |
| National | 1.8 | 5.7 | 19.4 |
Red-breasted Merganser
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -1.0 | 131.8 | 12.1 |
| National | -12.9 | 5.2 | -14.7 |
Little Grebe
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | 56.1 | 345.0 | 304.5 |
| National | 6.1 | 16.7 | 38.2 |
Oystercatcher
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | 7.9 | 140.0 | 140.0 |
| National | -17.5 | -31.1 | 10.8 |
Lapwing
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -76.6 | -70.2 | -84.8 |
| National | -6.5 | -45.1 | -63.9 |
Curlew
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -18.5 | 51.4 | 8.2 |
| National | -9.4 | -23.7 | -43.1 |
Turnstone
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -74.2 | -50.4 | -40.0 |
| National | -33.6 | -46.0 | -23.7 |
Dunlin
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -84.6 | -79.1 | -85.1 |
| National | 5.9 | -21.2 | -45.2 |
Redshank
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -20.3 | -17.8 | 43.2 |
| National | -14.0 | -28.4 | 6.7 |
Greenshank
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -8.4 | 84.9 | 113.0 |
| National | 0.9 | 7.3 | 41.0 |
Cormorant
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | 8.8 | 92.2 | 78.3 |
| National | 38.5 | 8.4 | 42.9 |
Grey Heron
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -36.3 | 42.5 | 28.0 |
| National | 1.0 | -4.9 | 6.6 |
Little Egret
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Croagh Bay | -24.7 | 108.8 | 205.1 |
| 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)