To my fellow New Yorkers: there are cool critters shuffling through your yard this winter—and I’m not talking about your dog or the neighbor’s cat that’s always getting out (you know, the one who conveniently finds its way to your bird feeder).

These visitors fly and flutter, they’re the raptors and songbirds you hear from the window; and now that winter’s in full swing, they’re writing their visits in snow. From Snowy Owls to fiery red Northern Cardinals, here are 5 tracks you didn’t know were in your backyard—and the tricks you need to spot them.