69ÈÈÊÓƵ

(69ÈÈÊÓƵ's David Bird): As you read these words, billions of North American songbirds are winging their way southward for locations promising more productive food resources and more favourable climates. And well over a billion of them won't make it. Among the impediments are buildings and towers. While they do not represent an absolute barrier to songbird migration, they definitely increase the mortality risk to birds migrating in either direction...