Birdsbesafe&reg; Cat Collar Cover and a Breakaway Buckled Cat Collar Birdsbesafe cat collar cover warns birds* of cat's presence. Patented, Birdsbesafe brightly colored collar cover with reflective trim. Can be worn 24/7. Collar and cover can fall open under pressure for safety. Breakaway buckled collar is 8 -12" and stretch elastic material. *Songbirds see bright colors well due to eye anatomy. Average 87% reduction in birds caught.