We have a b.o.p. not far from my own stock,and yes i have missing ones on occassion,lucky for me we get told when in the area by........??????????? guess what????
we start to see a police car go up the country lane opposite me, in a wild location on moors which leads only to a reservoir,this only happens when a b.o.p. is nesting in the area. a pF
We have an alarm on my house and sheds .... do they turn up if it goes off...no... but regulay visitors to see if the birds are ok.
How we know, I actually stopped the copper a few years ago and asked ! rich really and not over bright as he told me the reason quite openly, of which that info could be used for egg hunters etc.
I don't know exactly where they are nesting and being a law biding citizen not bothered but when my lass or me hear that unmistakable screech,we shut shop fast... nature eh...
whatever we keep be pigeons or fish/ koi theres always something wanting to eat em!