Larson traps have decimated the Hoodie Crow population in the far north of Scotland, so much so that there is now a serious lack of old nests for species such as Kestrel, Merlin, Long-eared Owl and Tawny Owl to nest in. This has led to a diversity of nesting habits for some species, Merlin in particular, many of these birds now nest mainly on the rank heather braes and burn sides. That is where there is any rank heather left after the constant indescriminate moor burning that takes place annually.
Here's a photo of a keepers gibbet, the concentrated efforts of one gamekeeper who travelled far and wide setting up Larson traps in the pursuit of Hoodie Crows.
nirofo.