An alternative name for a kestrel, and definitely what this one was doing!
Reading, UK, Canon R6 + RF800mm, 1/2000s, F10, ISO1000, Exposure Bias +1 1/3
Must have knocked the dial as that should have been F9. For most of its hover, its head was in the shadow of its wing , making for less than perfect shots needing drastic post processing, e.g.
Try this one - still messed with, but gives more of the shadows
Which, just cropped out of the camera’s RAW format (suffering from the classic dark bird against white sky issue with auto-ISO) was
And not entirely to my surprise, Windhover is even in the Oxford English Dictionary!