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Processionary Caterpillars are a group of caterpillars in the family ‘Thyrididae’. With about 1,200 described species, this is the largest known group of caterpillars on earth. They are particularly a concern for dog owners in Spain and Portugal because their hairs or spines are poisonous to dogs. Therefore you need to take great care walking your dog in certain areas. Today’s blog introduces these horrid little critters and gives you tips on how you and your dog can avoid them.
What are Processionary Caterpillars?
Processionary Caterpillars are found worldwide and feed on a variety of trees including oak, hazel, pistachio, cherry, plum and apricot. They often feed in groups or clusters and will sometimes form processions where they march up tree trunks together. This is where the name comes from — their habit of walking together in a long line.
The larvae are moderately to very hairy and have sharp spines which they can flick at anything that gets too close. They measure about 2–3cm long or roughly one inch. They usually have three pairs of thoracic legs, but some species…
