Close encounter
Because, I suppose, of the recent wet weather the slugs and snails have been active everywhere. The other day I spotted this tree slug (Limax maculatus) slithering slowly up a sallow wand. Eventually it progressed onto a leaf already occupied by larvae of the sawfly Nematus pavidus.
The caterpillars kept flicking up their tails to discourage the slug, which quite quickly turned tail and headed into a less crowded area.