A: Before we calculate CBC trends for a species, we divide the raw number of birds counted by a function that describes the statistical relationship between effort spent and birds counted. Then we ...

The Audubon Bird Guide is a free and complete field guide to over 800 species of North American birds, right in your pocket. Built for all experience levels, it will help you identify the birds around ...

Science fiction, comic book, fantasy, and video game news. ‘Buffy the Vampire Slayer’ star Sarah Michelle Gellar confirms a reboot is in the works, telling fans ‘we will only make this show ...