On Fri, 29 Nov 2019 08:51:16 +0000, Martin Brown
wrote:

snip

A wildlife PIR triggered camera might be more useful for your
application - that way you have some video of the scrotes.

I was going to investigate a(n invisible?) break-beam sort of device
that could be set higher than most ground dwelling creatures and below
the typical flight line of a bird. That connected to a GSM SMS dialler
so that I can 1) remotely view the CCTV then 2) potentially call the
Police.

Nothing the Police like to know better than the scrotes are still on
the scene. ;-)

Cheers, T i m