The winter I've had three opportunities to sketch a pair that winter near Cape Arago on the Oregon coast. We park and wait and photograph / sketch. I happiest when sit quietly for long stretches near a good subject .... and I can take my time sketching.
One day one of the peregrines spent over half an hour preening. Another day the female disappeared briefly and came back with a gull. The tercel (the male) waited on a lower perch and finally got the left-overs.