Try this it does work, glue 2 CD disc together, shiny side outside x 2 & drill a hole at the top each CD. Run fishing line between each Cd's that you have glue together about a foot apart.
Tie the fishing line from the gutter in front of window with 2 lots of CD
When the wind blows, the CDS turn & put a reflection against the windows as it is turning. Try this also near your plants
Believe it or not, give it a go.