Feather Friendly® Small-scale DIY is perfect for any small-sized bird collision prevention project (recommended for projects less than 100 Sq Ft)! Available in both White for Reflective or Combination glass surfaces and in Black for Fly-through glass surfaces. ✨🐦 shop.featherfriendly.com #birdfriendly #birdsafe #windowmarkers #glasscollision #featherfriendly