There is a local nature reserve near where I live called Millhoppers. It is owned by the Butteryfly Conservation society. I went out for a spin on the bike this afternoon and spend a little while taking in the nature there.
Whilst I sat contemplating I saw at least 3 (possibly 4) wrens, they were hunting for food, flying from tree to tree to flower stalk. The wren is the most populous bird in the UK and I guess it is not unexpected that I would see so many in such a small patch.
Also saw plenty of butterflies including common blue, they get Holly Blue’s in spring.
Here is a link to the website.