Table of Contents
What Are Hen Harriers?
The Hen Harrier (Circus cyaneus) is a medium-sized, ground-nesting bird of prey found across Ireland’s upland areas. They prefer open moorland for nesting, where they raise their young from April to July. In the winter, they disperse to lowland areas, gathering in communal roosts in agricultural lands, coastal reedbeds, and blanket bogs.
These birds are known for their distinctive flight patterns, often described as gliding in a shallow ‘V’ shape. The males perform an impressive sky dance to attract mates, soaring high before diving and spinning mid-air. This display has earned them the nickname “skydancer“.
What Do Hen Harriers Look Like?
Hen Harriers exhibit noticeable sexual dimorphism. Adult males have pale grey plumage, white underparts, and black-tipped wings, making them look ghostly against the moors. Females are larger, with brown plumage, a white rump, and distinct tail bars.
Their variation in size and colour allows for easy identification and is essential for understanding their behaviours and needs in conservation efforts. Both sexes contribute to raising the young, ensuring the species’ survival.
The Decline of the Hen Harrier in Ireland
The Hen Harrier population in Ireland has seen dramatic declines. According to the 2022 national survey, only 85-106 pairs remain. This is a 30% decrease from 2015 and a 59% decrease from 1998-2000. Habitat destruction caused by human activities significantly contributed to this decline.
The loss of these key habitats, particularly heathlands and grasslands, has reduced available nesting areas. Without intervention, the species faces the real risk of extinction in the coming decades. Experts warn that it could become extinct in the next 25 years if current trends continue.
The Importance of Special Protection Areas (SPAs)
The Hen Harrier is an endangered species in Ireland, protected under the EU Birds Directive. Special Protection Areas (SPAs) were designated in 2007 to protect crucial habitats for Hen Harrier breeding. These include upland areas such as the Slieve Bloom Mountains and the Slievefelim to Silvermines Mountains.
Unfortunately, recent surveys have revealed alarming population drops of between 20% and 80% in five of these protected areas. Conservationists argue for stronger actions, such as habitat restoration and stricter regulations on land use. Without these measures, these protected areas may not be enough to halt the rapid decline of Hen Harriers in Ireland.
Can the Hen Harrier Be Saved?
There is hope for the Hen Harrier, but urgent action is needed. Conservationists emphasise the importance of habitat restoration, ensuring that both breeding and wintering sites are preserved. Financial support for farmers willing to engage in conservation practices is essential for long-term success. The National Biodiversity Action Plan includes commitments that could play a role in halting the species’ decline.
With targeted efforts and cooperation between government agencies, farmers, and conservationists, it is possible to stabilise the Hen Harrier population. Immediate and coordinated action is necessary to prevent further losses and give this species a fighting chance for survival.
The Importance of Bird Surveys
Bird surveys are vital tools in wildlife conservation. For the Hen Harrier, these surveys are critical in tracking its declining population and assessing habitat changes. Accurate data also provides data on the effectiveness of conservation efforts and guides policy decisions. Thorough and frequent bird surveys can help protect vulnerable species like the Hen Harrier.
At Southern Scientific, we specialise in conducting bird surveys. Our trained ornithologists and ecologists provide accurate, reliable data to guide decision-making. With our expertise, we can provide valuable insights into the health of habitats and species like the Hen Harrier.
Get in touch for information about how we can assist you with Hen harrier surveys or ecological monitoring.
