I have been looking for the Bracken leafminer Chirosia histricina for a few years, now. It's clearly very choosy about where it lays its eggs: A long stretch of Bracken was empty apart from a very shaded section under a Beech. Maybe they like tightly-controlled temperature or humidity.
One of my favourite hoverflies - Leucozona glaucia:
A much more developed case of the fly-killing fungus Entomophthora muscae:
I'm already seeing dead flies on most Angelica plants now. (The fungus is the orange/pink area on the abdomen).
The fungal season has started quite early this year, so I'll show the first images in the next post.