I-WeBS River Boyne 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 River Boyne (site code 0V301) 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 | River Boyne - 5 Year | River Boyne - 12 Year | River Boyne - 23 Year | Long Term Trend |
|---|---|---|---|---|
| Teal | -99.1 | -79.2 | -85.2 | Large Decline |
| Mute Swan | -68.8 | -87.4 | -77.8 | Large Decline |
| Grey Heron | 2.4 | -62.7 | -19.6 | Intermediate Decline |
| Mallard | -8.2 | -19.8 | 0.0 | Stable or Increasing |
| Lapwing | -73.1 | 18.4 | 22.0 | Stable or Increasing |
| Curlew | 8.5 | -11.1 | 28.0 | Stable or Increasing |
| Cormorant | 35.9 | -18.5 | 32.5 | Stable or Increasing |
| Little Grebe | 111.8 | 33.3 | 35.8 | Stable or Increasing |
| Redshank | 3.9 | 340.0 | 388.9 | Stable or Increasing |
| Wigeon | -7.6 | 621.9 | 1343.8 | Stable or Increasing |
| Little Egret | -54.4 | NA | NA | Not Applicable |
Species Analysis
Mute Swan
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | -68.8 | -87.4 | -77.8 |
| National | 4.6 | 9.6 | 13.8 |
Wigeon
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | -7.6 | 621.9 | 1343.8 |
| National | 0.9 | -17.0 | -18.2 |
Mallard
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | -8.2 | -19.8 | 0.0 |
| National | -11.3 | -19.7 | -19.1 |
Teal
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | -99.1 | -79.2 | -85.2 |
| National | 1.8 | 5.7 | 19.4 |
Little Grebe
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | 111.8 | 33.3 | 35.8 |
| National | 6.1 | 16.7 | 38.2 |
Lapwing
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | -73.1 | 18.4 | 22.0 |
| National | -6.5 | -45.1 | -63.9 |
Curlew
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | 8.5 | -11.1 | 28.0 |
| National | -9.4 | -23.7 | -43.1 |
Redshank
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | 3.9 | 340.0 | 388.9 |
| National | -14.0 | -28.4 | 6.7 |
Cormorant
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | 35.9 | -18.5 | 32.5 |
| National | 38.5 | 8.4 | 42.9 |
Grey Heron
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | 2.4 | -62.7 | -19.6 |
| National | 1.0 | -4.9 | 6.6 |
Little Egret
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| River Boyne | -54.4 | NA | NA |
| 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)