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Does anyone have any ideas on how to deter snakes from bird boxes? We have lost so many birds in our boxes due to snakes...
And just this morning I found a snake in the wren's nest with two dead parents and no babies. I was devastated... the babies would have been ready to leave the nest soon and the parents were taking such great care of them

I am trying to think up something to put around the boxes to scare off the snakes... but I cant come up with anything

Its almost not worth putting up the bird boxes because this happens nearly every time.

If the boxes are on a pole you could wrap a small voltage electric fence wire around the bottom of the post attached to a transformer that plugs into a wall socket. The same type electric fence transformers used for cattle or dogs.

Or, maybe you could wrap the bottom of the pole with razor wire or course barbed wire. I would think razor wire would be better than barbed wire though.