I-WeBS Lower Blackwater River 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 Lower Blackwater River (site code 0M304) 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 | Lower Blackwater River - 5 Year | Lower Blackwater River - 12 Year | Lower Blackwater River - 23 Year | Long Term Trend |
|---|---|---|---|---|
| Goldeneye | 366.7 | -38.5 | -79.1 | Large Decline |
| Lapwing | -60.2 | -30.9 | -60.7 | Large Decline |
| Curlew | 32.3 | -13.1 | -60.0 | Large Decline |
| Mute Swan | 293.8 | -3.1 | -55.3 | Large Decline |
| Dunlin | 8.2 | 25.3 | -54.8 | Large Decline |
| Golden Plover | -89.9 | -87.2 | -46.9 | Moderate Decline |
| Cormorant | 63.0 | -13.8 | -46.8 | Moderate Decline |
| Mallard | -34.7 | -17.9 | -43.2 | Moderate Decline |
| Shelduck | 82.6 | -28.2 | -42.1 | Moderate Decline |
| Wigeon | 32.1 | -28.8 | -39.0 | Moderate Decline |
| Grey Heron | 3.6 | -20.4 | -34.4 | Moderate Decline |
| Teal | -24.1 | -5.7 | -29.9 | Moderate Decline |
| Redshank | 12.5 | -27.7 | -29.8 | Moderate Decline |
| Black-tailed Godwit | -19.4 | 16.0 | -4.1 | Intermediate Decline |
| Oystercatcher | 88.6 | -15.9 | 10.9 | Stable or Increasing |
| Greenshank | 34.5 | 45.8 | 116.7 | Stable or Increasing |
| Little Egret | 48.5 | 71.9 | 292.0 | Stable or Increasing |
Species Analysis
Mute Swan
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 293.8 | -3.1 | -55.3 |
| National | 4.6 | 9.6 | 13.8 |
Shelduck
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 82.6 | -28.2 | -42.1 |
| National | 6.3 | -0.8 | 9.3 |
Wigeon
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 32.1 | -28.8 | -39.0 |
| National | 0.9 | -17.0 | -18.2 |
Mallard
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | -34.7 | -17.9 | -43.2 |
| National | -11.3 | -19.7 | -19.1 |
Teal
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | -24.1 | -5.7 | -29.9 |
| National | 1.8 | 5.7 | 19.4 |
Goldeneye
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 366.7 | -38.5 | -79.1 |
| National | -32.5 | -39.0 | -66.9 |
Oystercatcher
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 88.6 | -15.9 | 10.9 |
| National | -17.5 | -31.1 | 10.8 |
Lapwing
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | -60.2 | -30.9 | -60.7 |
| National | -6.5 | -45.1 | -63.9 |
Golden Plover
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | -89.9 | -87.2 | -46.9 |
| National | -16.9 | -58.1 | -54.1 |
Curlew
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 32.3 | -13.1 | -60.0 |
| National | -9.4 | -23.7 | -43.1 |
Black-tailed Godwit
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | -19.4 | 16.0 | -4.1 |
| National | 22.5 | 25.0 | 92.3 |
Dunlin
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 8.2 | 25.3 | -54.8 |
| National | 5.9 | -21.2 | -45.2 |
Redshank
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 12.5 | -27.7 | -29.8 |
| National | -14.0 | -28.4 | 6.7 |
Greenshank
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 34.5 | 45.8 | 116.7 |
| National | 0.9 | 7.3 | 41.0 |
Cormorant
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 63.0 | -13.8 | -46.8 |
| National | 38.5 | 8.4 | 42.9 |
Grey Heron
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 3.6 | -20.4 | -34.4 |
| National | 1.0 | -4.9 | 6.6 |
Little Egret
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Lower Blackwater River | 48.5 | 71.9 | 292.0 |
| 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)