harriers still slow

this pair has been present all winter but no new birds are arriving I fear a result of persecution last year -- they mated a few times this morning but nest building is very half hearted -- the female is the least active raptor I have ever seen and sits for hours on end literally doing nothing so a quick flight and fight with Carrion Crows was unusual! -- its salutary to recall just how big a Carrion Crow is in direct comparison with a female harrier but those claws would make short work of a corvid if needed --