Hi Hans,

Normally, at this northern latitude, Merlins have just arrived back on
territory at this time of year. They are very active just prior to laying.
A Predator's hatching of young is timed to the vulnerable young of the prey
species.

I suspect that what you witnessed was either a pair-bonding flight or a
more - "pure" courtship one.

Tim Barksdale
Mokane, MO
Choteau, MT