Humming bird hawk moth

There were once rare in the UK when they migrated from southern Europe. 

They appear to be more common in the UK, possibly as a result of climate change. 

The wings beat very fast (about 75 beats a second!), so they can hover like a humming bird.  At one time people thought they were birds!

There was one in the garden yesterday.

See https://en.wikipedia.org/wiki/Hummingbird_hawk-moth .