Window Alert UV Liquid Gordo Starling-Resistant Flicker Birdhouse by Coveside

Starling-Resistant Flicker Birdhouse by Coveside Conservation

This ultraviolet light is barely visible to humans

Socket includes set screw and 1/2" turning hole

•Unique 2 piece base

Window Alert UV Liquid Gordo Starling-Resistant Flicker Birdhouse by CovesideUV Liquid by WindowAlert prevents window strikes, makes it easy for birds to see your windows. Convenient to use on entire window areas, the bingo type marker dries almost clear. Reflects ultraviolet sunlight to alert birds of glass. Barely visible to humans, birds see the marks as a brilliant glowwarning them to stop! Dab or draw on the outside of window in circles, dots, squiggles or lines even get fancy if you like! For best results use with a few