These caterpillars (each about 1.5in long) live communally in tent-like silk structures, usually in hawthorn of blackthorn which is their staple diet. They are very rare in the UK, Somerset being one of their few strongholds!
@bluerose15 - yes I know that creepie crawlies aren't everyone's cup of tea! At least these move slowly - it's the things that dart around so you never know where they are going to end up that worry me!
@jomo - there's a pic on this page http://www.montgomeryshiremoths.org.uk/macro%20moths/pages/1633%20Small%20Eggar.htm
@bluerose15 - yes I know that creepie crawlies aren't everyone's cup of tea! At least these move slowly - it's the things that dart around so you never know where they are going to end up that worry me!
@novab @yeshanghai @firzhugh @shirleybankfarm @gijsje @copperband @mona65 - thanks for the lovely comments and favs
@ajwfromapethorpe - great! It's good to know they are flourishing is several places