Calling all Experimenters!!! Try this and report back!

[zorgon]

Many people use that here in Portugal, but I never used it, I never felt the need for it.

Interesting... odd that I never ran across this before

Now, if you find something to keep pigeons away, I would thank you.

Bird-X BG Balcony Gard Ultrasonic Bird Repeller

PS: a hawk or something like it is not a practical solution, although it would be an ecological one.

That was my first choice

Bird B Gone MMRTH1 Hawk Decoy

[zorgon]

it actually works; bugs think it is a hornet's nest; will post the info as to how to apply for a research grant to investigate the matter...
seeker

Good idea  they made millions researching the hole in the ozone layer over the poles... only to find out it was always there

Also saw that flies see the reflection and see it as spiderwebs. That makes sense actually...