I-WeBS Ballydehob Estuary 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 Ballydehob Estuary (site code 0L475) 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 | Ballydehob Estuary - 5 Year | Ballydehob Estuary - 12 Year | Ballydehob Estuary - 23 Year | Long Term Trend |
|---|---|---|---|---|
| Red-breasted Merganser | 59.3 | 22.9 | -25.9 | Moderate Decline |
| Oystercatcher | 3300.0 | 6.2 | 0.0 | Stable or Increasing |
| Teal | 463.6 | 44.2 | 12.7 | Stable or Increasing |
| Mute Swan | 69.8 | 19.7 | 14.1 | Stable or Increasing |
| Cormorant | 46.7 | 8.2 | 22.2 | Stable or Increasing |
| Mallard | 3.8 | 10.0 | 39.2 | Stable or Increasing |
| Wigeon | -48.1 | -1.8 | 77.4 | Stable or Increasing |
| Grey Heron | 124.3 | 88.6 | 124.3 | Stable or Increasing |
| Curlew | 176.2 | 114.8 | 132.0 | Stable or Increasing |
| Black-tailed Godwit | 77.8 | 29.7 | 242.9 | Stable or Increasing |
| Dunlin | 1142.9 | 163.6 | 262.5 | Stable or Increasing |
| Little Grebe | 77.1 | 100.0 | 313.3 | Stable or Increasing |
| Greenshank | 73.8 | 89.3 | 341.7 | Stable or Increasing |
| Redshank | 186.1 | 68.9 | 390.5 | Stable or Increasing |
| Little Egret | 87.2 | 62.2 | 630.0 | Stable or Increasing |
Species Analysis
Mute Swan
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 69.8 | 19.7 | 14.1 |
| National | 4.6 | 9.6 | 13.8 |
Wigeon
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | -48.1 | -1.8 | 77.4 |
| National | 0.9 | -17.0 | -18.2 |
Mallard
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 3.8 | 10.0 | 39.2 |
| National | -11.3 | -19.7 | -19.1 |
Teal
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 463.6 | 44.2 | 12.7 |
| National | 1.8 | 5.7 | 19.4 |
Red-breasted Merganser
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 59.3 | 22.9 | -25.9 |
| National | -12.9 | 5.2 | -14.7 |
Little Grebe
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 77.1 | 100.0 | 313.3 |
| National | 6.1 | 16.7 | 38.2 |
Oystercatcher
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 3300.0 | 6.2 | 0.0 |
| National | -17.5 | -31.1 | 10.8 |
Curlew
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 176.2 | 114.8 | 132.0 |
| National | -9.4 | -23.7 | -43.1 |
Black-tailed Godwit
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 77.8 | 29.7 | 242.9 |
| National | 22.5 | 25.0 | 92.3 |
Dunlin
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 1142.9 | 163.6 | 262.5 |
| National | 5.9 | -21.2 | -45.2 |
Redshank
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 186.1 | 68.9 | 390.5 |
| National | -14.0 | -28.4 | 6.7 |
Greenshank
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 73.8 | 89.3 | 341.7 |
| National | 0.9 | 7.3 | 41.0 |
Cormorant
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 46.7 | 8.2 | 22.2 |
| National | 38.5 | 8.4 | 42.9 |
Grey Heron
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 124.3 | 88.6 | 124.3 |
| National | 1.0 | -4.9 | 6.6 |
Little Egret
| Site | 5 Year | 12 Year | 23 Year |
|---|---|---|---|
| Ballydehob Estuary | 87.2 | 62.2 | 630.0 |
| 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)