To add to Jens alterantive name for a Kestrel here are some more from times gone by :-
Bloodhawk.............Oxfordshire
Creshawk...............Cornwall
Cristelhawk / Fieldhawk.........Surrey
Hoverhawk............Buckinghamshire, Berkshire
Keelie...........Edinburgh
Maalin..............Shetland
Mouse Falcon..........Orkney and Yorkshire
Mousehawk / Redhawk.........Lancashire and Stirlingshire
Standhawk / Stanchel............West Yorkshire
Staniel / Stannel/ Vannerhawk/ Wind Bivver..............Sussex
Wind Bibber.............Kent
Wind Cuffer.............Orkney
Wind Fanner............Surrey
Wind Hover............west and south England
Wind Sucker..........Kent
In 1599 for over 200 years it was known as the Wind Fu**er and F**k Wind but this was dropped for obvious reasons.
So there you go... West Yorkshire Birding, your educational blog, full of useless information.
BS