Today at Putah Creek Riparian Reserve (0.5 miles-ish east of Pedrick Road) I saw a raptor perched above the creek with these characteristics:
Kestrel-like long barred tail, which it wagged from side to side
Dark slaty-gray back with several squarish white spots (strange!!)
Dark head/face without any kestrel-like facial markings
Does anyone have an idea of what this could be?