larvae seen in water butt

larvae seen in water butt

Observation - larvae seen in water butt - UK and Ireland. Description: Body like a small greyish worm, about icm long, with a very thin tail about twice as long On July 17th, I saw a whole bundle of them (photo attached), with individuals breaking off and swimming away. they swim with a movement rather like a caterpillar.

Body like a small greyish worm, about icm long, with a very thin tail about twice as long
On July 17th, I saw a whole bundle of them (photo attached), with individuals breaking off and swimming away. they swim with a movement rather like a caterpillar.