I just had a weird experience. I was outside in my backyard and I heard the unmistakable call of a killdeer. This was a bit of a shock, because I live in the suburbs, not Killdeer habitat. I grabbed my bins and began scanning the neighboring yards lawns, but no black and white plover was in sight. But there was a Mockingbird hopping around. Hmmm… suddenly the mocker opened it’s beak and called. Killdeeeer! Whoa! How did a mockingbird learn a Killdeer’s call? Could it have traveled from more open areas? Any ideas?