This 2015 video from the USA says about itself:
Raptor Migration | Seasonal Science | UNC-TV
Warden Joeri Lamers on Terschelling island in the Netherlands blogs today about raptor migration. He writes that recently wardens at Boschplaat nature reserve in the east of the island saw twelve bird of prey species on spring migration: osprey, sea eagle, black kite, red-footed falcon, kestrel, Montagu’s harrier, hen harrier, marsh harrier, pallid harrier, goshawk, sparrowhawk and buzzard.
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