"michael adams" wrote in message
...

"TimW" wrote in message
...
I am involved in a project to put some small wooden structures like
nesting boxes out in some woodland. The Desire is that they should be 100%
(or at least 99%) biodegradable, so they last as long as poss but
ultimately rot away to nothing. Fixing them in trees with synthetic ropes
or straps is therefore obviously a complete no-no. So traditional rope is
required.

Isn't this risking unwarrented distress, never mind cruellty to any adult
birds and
nestlings who may find tjhemselves trapped in a nestbox which has
plummeted
to ground as a result of a rope failing "prematurely"

Just as true of your wooden peg in the tree. That will likely fail before
the box does.