sally H wrote:
I have just bought vaious bird boxes and should like to put them up around
the garden.

The question is - how do you secure them to the tree trunks because I
thought that banging a nail into the tree will kill or hurt it.

thanks


Trees are very difficult to kill if healthy, banging a nail in won't.
However the problem comes if the tree is cut down, it could well injure,
or even kill the chainsaw operative, and certainly wreck the chain.