I saw these lovely looking caterpillars on my Silver Birch. When approached they arched their backs. I did a search on the internet and found out that they were in fact Sawfly Larvae and they can strip a young tree. I wasn't taking any chances, I don't know how long they'd been there but one branch was almost stripped bare. I put them on the bird table but nothing wanted them. Seems that when they arch their backs they also give off a foul smell.

A Hoverfly

Another type of Hoverfly

A Brown Hawker Dragonfly. It spent ages flying around as I vainly tried to take a photo, but then it settled on the hedge long enough.

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