Great Tit (Parus major)
Nikon D7200, Nikon 200-500mm f/5.6
f/6.3, 1/500s, ISO 500, 500mm
Cambridgeshire 2019

The largest Tit species found in the UK, its range covers almost the whole of the mainland, apart from the highest parts of the the Scottish highlands.
It can be a bit of a bully and I see it on our bird feeders pushing off other species including Starlings, which takes some doing!
It has a distinctive call that sounds very much like Teacher! Teacher!
Pretty much, if I was shooting this with my D850 and 200-500mm at 500mm and f/7.2 and the owl was 20ft away the total depth of field would be 2.3 inches 5.8cm. That's half that in front of the plane of focus and half behind. That's about as shallow as I would want to go and so looking at that image I think it's shot at maybe 300mm