Tool-using rookies; a squirrelous video; uproarious wordplay

Unlike their corvine cousins, rooks don't show off their tool-using ability in the wild, but that doesn't mean they're a simpler breed. Given appropriate conditions in the lab - and a "tasty morsel" like a waxworm to tempt them - rooks (Corvus frugilegus) can use various combinations of sticks and stones to dip their beaks in some treats. They can even modify a stick or a piece of wire to complete the task.

See the videos at BBC News.

"The interesting thing about the rooks is that they do not use tools in the wild," says the deliciously named Christopher Bird, the study's lead author.

"The upshot," says the Economist, "is that toolmaking, at least in crows, does not look like a specifically evolved ability but rather an extension of general intelligence. Perhaps wild rooks are not presented with a need to use tools, and so don’t bother."

Other non-primates - elephants, cetaceans, various birds and rodents - also use tools. There may be uncounted species among them like the rooks who just don't exhibit tool use in the wild, where it's unnecessary.

And here we have a delightful video of the lengths those rascally sciurids will go to for a treat or a candy bar - not so different, us and the animals, hmm?