The Leaf Cutter Bees from last year have hatched.
The first visitors showing an interest in the smaller holes I have provided in Holly Wood are a different species.

I will try and Identify. EDIT:- Red Masonary Bee almost certainly. I thought they were but using holes in timber confused me. Seems they will use clay to line the cells within the wood.
I think this one is yet another 'variety'.
