The nice thing about that is, if the tulle gets snagged on a branch and tears it doesn't produce square holes. It seems to me that the non-flexible, square-shaped holes in bird netting are what the critters can't get out of. Heck, I've had my thumb stuck in it and really had to struggle to get it free.
I, too, felt terrible about those that got caught in bird netting; here, I'd enticed the birds to keep my garden's bugs under control, and then inadvertently caused trouble for them.
