If you spend enough time browsing garden and landscape concepts, you'll inevitably stumble into the mirror debate. The creativity camp wants an interesting mirror gracing the garden, and wildlife enthusiasts call cruelty, as birds might be hurt or killed by flying into the mirror thinking it's just more sky.
My question is this: how stupid does a bird have to be to collide with its own reflection? The idea is so preposterous that I can't even come up with a Jeremy Renner reference.
I experimented, myownself. I had a mirror in the garden for years. I'm happy to report no bird deaths. Occasionally a one-man cat fight, but never any bird casualties.