Ravens Know When Food-Thieving Rivals Are Watching

Now scientists have found that ravens seem to know when they're being watched by a rival that might steal from them, and then take steps to hide their food. Previous behavior studies with scrub jays, which are raven relatives, showed that they could interpret other bird's thieving intentions — if they spied another jay watching them while they had food, they hid the food away. But the scientists behind the new study wondered — did the jay with the food really know what the rival bird