They're often found crawling in a procession (hence the name) and there can be hundreds in one line. This is when you need to be the most careful, they pose a real danger to children and pets. The 'hairs' covering them are an extreme irritant and can cause severe asthma attacks, allergic reactions and necrotising fasciitis. There are many cases of dogs being caught out on walks, so please be very wary, especially in or around pine forests.
French property blog
