Birds going to window birdfeeders are like airplanes coming in to land at an airport. A word of caution though, tabs on collar actually used wander your cat on a leash unless the cat also wears a harness for the leash to get attached at. This is how you can assist the little ones safe. https://Socialrator.com/story10596549/beyond-the-bird-house-creating-the-perfect-backyard-habitat-for-bird-feeding