I-WeBS Ballyshunnock Reservoir 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 Ballyshunnock Reservoir (site code 0M101) 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 | Ballyshunnock Reservoir - 5 Year | Ballyshunnock Reservoir - 12 Year | Ballyshunnock Reservoir - 23 Year | Long Term Trend |
|---|---|---|---|---|
| Tufted Duck | -37.9 | -43.6 | -80.6 | Large Decline |
| Mallard | -15.4 | 23.2 | -68.5 | Large Decline |
| Little Grebe | -28.0 | -13.0 | -66.9 | Large Decline |
| Wigeon | 45.5 | 47.4 | -48.1 | Moderate Decline |
| Mute Swan | -37.1 | 15.8 | -21.2 | Intermediate Decline |
| Cormorant | 900.0 | 19.0 | 78.6 | Stable or Increasing |
| Grey Heron | 43.9 | -29.1 | 126.2 | Stable or Increasing |
Species Analysis
Mute Swan
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballyshunnock Reservoir | -37.1 | 15.8 | -21.2 |
| National | 4.6 | 9.6 | 13.8 |
Wigeon
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballyshunnock Reservoir | 45.5 | 47.4 | -48.1 |
| National | 0.9 | -17.0 | -18.2 |
Mallard
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballyshunnock Reservoir | -15.4 | 23.2 | -68.5 |
| National | -11.3 | -19.7 | -19.1 |
Tufted Duck
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballyshunnock Reservoir | -37.9 | -43.6 | -80.6 |
| National | -20.7 | -28.9 | -17.9 |
Little Grebe
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballyshunnock Reservoir | -28.0 | -13.0 | -66.9 |
| National | 6.1 | 16.7 | 38.2 |
Cormorant
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballyshunnock Reservoir | 900.0 | 19.0 | 78.6 |
| National | 38.5 | 8.4 | 42.9 |
Grey Heron
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballyshunnock Reservoir | 43.9 | -29.1 | 126.2 |
| National | 1.0 | -4.9 | 6.6 |
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)