Talking raven

As ravens return to their roost at night, the range of calls made is incredible. Ravens have more than 30 different calls - their own language, which we don't fully understand but the birds constantly communicate with each other. It's thought they may be sharing information - possibly about food such as a dead carcass nearby which they can't defend on their own. By sharing the information, the birds can return the next day as a group and feed together.