Biting Insects

Ireland is generally a very safe place as regards wildlife. There are no large predators that might attack humans – no bears, no wolves, no large cats. However, some of the smaller creatures can prove troublesome. In particular, swarms of small biting flies (midges) are very irritating on warm, humid days. Walkers venturing off track may occasionally be bitten by ticks, and all walkers should be aware that ticks can, in rare cases, carry Lyme Disease.

Biting Midges

Midges are tiny biting flies that are active from mid-May to September particularly when it is calm and overcast. They are a significant annoyance to people exploring the hills and to the animals that live there.

There is no known disease transmission from midges to people in Ireland. However, they will provoke a strong immune reaction in some individuals. This may lead to swelling and intense itching around the site of the bite. The severity and intensity of biting accentuates people’s discomfort. Scratching of the bites may lead to infected sores.

Midges tend to proliferate around stagnant water and bog pools and are therefore a feature of life in the hills. They can also be a pest in the valleys such as Glendalough. Midges are most active on calm, cloudy and moist days. They don’t like strong sunlight, dry air or wind. They tend to be most active at dawn and dusk but can be prevalent at other times during the day if the conditions are right. If it is a ‘midgy’ day then activities such as picnics should be avoided. Staying in one place will quickly result in midges congregating around you.

There are repellents available in supermarkets and chemists, which help deter them. Most of these will contain a chemical component called “DEET”. Herbal repellents contain extracts such as bog-myrtle and citronella. In general, to protect against midges whilst walking, wear full arm and leg cover and a hat preferably of a light colour – midges are attracted to dark colours to rest on. Midges can also be kept off by using a head-net which has been designed for midges – mosquito nets are not good enough. Nets are unaffected by perspiration and do not require a chemical repellent, but they can cause a headache through eyestrain. Dark nets are best for viewing through.

The midges of most interest to us are those of the genus Culicoides . There are 29 species in Ireland, including six that will bite people. The most significant nipper is Cuculiodes impunctatus. It is only the female midge that bites, doing so to extract protein from our blood, which will help develop their eggs. While most midge species are intolerant to direct sunlight there is one Culicoides heliophilus which will emerge on sunny days.

Lyme Disease & Ticks

Lyme Disease (Borreliosis) is a disease that is carried by ticks. A tick is a parasite that bites, attaches itself to one’s skin for up to a week, and swells as it feeds. Anyone visiting Wicklow Mountains National Park should check for ticks, especially in the summer and autumn months. Parents should check any small children on their return home.

Symptoms of Lyme Disease

A rash can appear 3—30 days after a tick bite. This rash starts at the bite a grows larger with time. Often the centre then fades giving a ’bulls-eye’ appearance.

  • Fever
  • Chills
  • Headaches
  • Stiff neck
  • Fatigue
  • Muscle aches
  • Joint pain
  • Occasionally the heart, joints and nervous system are affected

What to do if you find a tick

  • Firstly—don’t panic! Ticks need to be attached for 24—48 hours before infection takes place.
  • Remove the tick with tweezers, gripping close to the skin.
  • Wash the area with soap and water.
  • There may be a bit of redness and swelling after this. This is normal. However, if a rash or other symptoms develop, a doctor should be contacted. Treatment is with a course of antibiotics.

How common is Lyme Disease?

Not common at all. In fact, we have never had a case reported to us here in the National Park. In the UK there are believed to be about 1000 cases a year. However, we do want our visitors to be aware of the disease, just in case.

For more information on Ticks & Lyme Disease:

Download the Health & Safety Authority’s Leaflet on ‘HSE Tick Bites & Lyme Disease‘., Ireland’s first Lyme disease charity. Tick Talk was set up by Lyme sufferers to encourage awareness, prevention and treatment of Lyme disease in Ireland.

Remember, Be Aware, but Don’t Worry