Yesterday we learned that the UK Hen Harrier population in 2016 was lower than in the previous two comparable surveys (2004 and 2010) but slightly higher than in 1998 and 1988/89.
In the Isle of Man, a self-governing Crown Dependency (which is not a part of the UK, nor subject to the Common Agricultural Policy by the way), the comparable figures are as follows (number of territorial pairs):
Isle of Man Hen Harriers
|Isle of Man||44||49||57||29||30|
The Isle of Man is different – a small area with relatively high densities of Hen Harriers (despite recent declines (which themselves followed earlier increases). the prey base and predator complement are very different from most areas of the UK. There are no Foxes, Badgers, Otters or voles on the Isle of Man, but there are Stoats, Rabbits, Brown Hares and Mountain Hares (see here and here). We know that some Hen Harriers reared on the Isle of Man visit the UK (see here).
I’d welcome comments on the situation there, or even, if anyone is up for it, a guest blog on the subject.