I-WeBS Knockaderry 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 Knockaderry Reservoir (site code 0M102) 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 | Knockaderry Reservoir - 5 Year | Knockaderry Reservoir - 12 Year | Knockaderry Reservoir - 23 Year | Long Term Trend |
|---|---|---|---|---|
| Pochard | 44.2 | -22.5 | -91.4 | Large Decline |
| Teal | -6.9 | -35.1 | -71.2 | Large Decline |
| Mallard | 58.6 | -68.6 | -29.8 | Moderate Decline |
| Tufted Duck | -12.1 | -40.9 | -18.3 | Intermediate Decline |
| Coot | -13.1 | -46.1 | -11.7 | Intermediate Decline |
| Mute Swan | -35.4 | 56.9 | 1.0 | Stable or Increasing |
| Wigeon | -16.6 | -31.1 | 17.8 | Stable or Increasing |
| Little Grebe | 23.2 | 81.6 | 200.0 | Stable or Increasing |
Species Analysis
Mute Swan
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Knockaderry Reservoir | -35.4 | 56.9 | 1.0 |
| National | 4.6 | 9.6 | 13.8 |
Wigeon
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Knockaderry Reservoir | -16.6 | -31.1 | 17.8 |
| National | 0.9 | -17.0 | -18.2 |
Mallard
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Knockaderry Reservoir | 58.6 | -68.6 | -29.8 |
| National | -11.3 | -19.7 | -19.1 |
Teal
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Knockaderry Reservoir | -6.9 | -35.1 | -71.2 |
| National | 1.8 | 5.7 | 19.4 |
Pochard
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Knockaderry Reservoir | 44.2 | -22.5 | -91.4 |
| National | -19.8 | -60.4 | -79.1 |
Tufted Duck
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Knockaderry Reservoir | -12.1 | -40.9 | -18.3 |
| National | -20.7 | -28.9 | -17.9 |
Coot
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Knockaderry Reservoir | -13.1 | -46.1 | -11.7 |
| National | -10.1 | 1.1 | -23.2 |
Little Grebe
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Knockaderry Reservoir | 23.2 | 81.6 | 200.0 |
| National | 6.1 | 16.7 | 38.2 |
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)