Since the warm weather in spring, the Forestry Commission warns the oak processionary moth is growing much quicker and those working in areas affected are to remain vigilant.

Covered in long hairs, the caterpillars descend down oak trees in head-to-tail procession feeding on leaves which can negatively impact the oaks growth. This can weaken the tree and leave it more vulnerable to other stress and diseases.

Also prevalent in the silky white nests, the caterpillar hairs can cause itchy rashes, eye and throat irritation and should not be touched.

Oak processionary moth programme manager Dr Edward Straw comments:

"The warm weather in spring has led to oak processionary moth growing quicker than in previous years and we may see higher infestation levels.

“It is important those living and working in areas affected by oak processionary moth remain vigilant in particular.

The Forestry Commission has a whole host of information online that can be used to identify the moth.

Any sightings should be recorded on TreeAlert.

Image credit: Forest Research, Henry Kuppen