I've been using thermal to spot since 2014 and shoot since 2017 and as yet there are no thermals that can reliably tell the sex of a deer except when they are in velvet
On the various permissions I shoot, I see literally hundreds of roe deer, but for most of the year it is not possible to be certain whether you're looking at a buck or a doe.
Just now it's easy because the bucks are in velvet and the heat from the growing antlers is very visible.
However, for a larger part of the year there is no difference in the heat signature between a mature doe and a buck.
So, if NV/thermal is to become legal, what happens to close seasons?
Cheers
Bruce