John K Jordan
I found that to discourage the birds at the blueberries instead of wrapping the bushes I needed just a few strips of mesh laid across the top. No snakes in those.

I think a mesh of some material with thicker strands than the very thin monofilament used might be kinder to snakes by not getting caught in the scales. Also, larger holes might let them go through and still keep out the birds.

JKJ