"There are a lot of bumble bees about. Thought they were nearly extinct".

This is almost their most active period of the year - and there's many species and it's the most specialised ones that are disappearing first. Look for a bee key somewhere, and try to identify them. That'll keep you busy for the three months. I've a colony in my allotment shed - in an old mousehole. I saved one from death by exposure, which technically means I've become a beekeeper (just like Sherlock Holmes did). Only he kept honeybees rather than bumblebee. They recognise me and keep shed from marauders, perhaps.

"Well, stuff left where it didn't oughta has no finer points I reckon, only fine words designed to excuse it. Holy moley, leave nothing but footprints, how come this thread isn't a universal confirmation of that principle and how come it's said to be more complicated than that? Who knows?

But of course following such logic the stones and sites themselves are to be considered litter.
I think you know it's more complex?
I have to say as voice of dissent (it appears to me) to feel rather besieged for just standing up for others rights/freedoms of expression, if they do no harm.