I-WeBS Castlemartyr Lake 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 Castlemartyr Lake (site code 0L021) 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 | Castlemartyr Lake - 5 Year | Castlemartyr Lake - 12 Year | Castlemartyr Lake - 23 Year | Long Term Trend |
|---|---|---|---|---|
| Tufted Duck | -14.0 | -69.4 | -87.2 | Large Decline |
| Teal | 170.5 | -51.2 | -36.4 | Moderate Decline |
| Mute Swan | -53.2 | -16.1 | 30.6 | Stable or Increasing |
| Mallard | 86.3 | -6.9 | 50.8 | Stable or Increasing |
| Shoveler | 286.3 | 95.8 | 123.8 | Stable or Increasing |
| Wigeon | 800.0 | 167.9 | 158.6 | Stable or Increasing |
| Grey Heron | 319.0 | 83.3 | 158.8 | Stable or Increasing |
| Gadwall | 900.0 | -44.1 | 300.0 | Stable or Increasing |
| Little Grebe | 17.6 | 344.4 | 344.4 | Stable or Increasing |
| Little Egret | -58.6 | 59.6 | 7400.0 | Stable or Increasing |
Species Analysis
Mute Swan
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Castlemartyr Lake | -53.2 | -16.1 | 30.6 |
| National | 4.6 | 9.6 | 13.8 |
Shoveler
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Castlemartyr Lake | 286.3 | 95.8 | 123.8 |
| National | 23.0 | -21.3 | -10.8 |
Gadwall
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Castlemartyr Lake | 900.0 | -44.1 | 300.0 |
| National | -26.5 | 4.3 | 24.4 |
Wigeon
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Castlemartyr Lake | 800.0 | 167.9 | 158.6 |
| National | 0.9 | -17.0 | -18.2 |
Mallard
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Castlemartyr Lake | 86.3 | -6.9 | 50.8 |
| National | -11.3 | -19.7 | -19.1 |
Teal
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Castlemartyr Lake | 170.5 | -51.2 | -36.4 |
| National | 1.8 | 5.7 | 19.4 |
Tufted Duck
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Castlemartyr Lake | -14.0 | -69.4 | -87.2 |
| National | -20.7 | -28.9 | -17.9 |
Little Grebe
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Castlemartyr Lake | 17.6 | 344.4 | 344.4 |
| National | 6.1 | 16.7 | 38.2 |
Grey Heron
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Castlemartyr Lake | 319.0 | 83.3 | 158.8 |
| National | 1.0 | -4.9 | 6.6 |
Little Egret
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Castlemartyr Lake | -58.6 | 59.6 | 7400.0 |
| 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)