How crows mastered the art of tool use [Mad Science]

Tool use is extremely rare within the animal kingdom, so it’s a huge deal once we discover crows going to considerable trouble to exploit sticks for hunting beetle larvae hiding inside branches.

Using a tiny stick will possibly not look like much, nonetheless it’s the crow equivalent of piloting a 747 or running a particle accelerator – it takes years of teaching to master and it’s still pretty difficult even for experts at the practice. The crows, found on the Pacific island of latest Caledonia, also ought to make the decision to benefit the right way to use the sticks once they are very young, in any other case they won’t be capable of pick up the skill later. So why do crows bother with something so brutally complicated?

The answer lies in their diets. Oxford researcher Christian Rutz examined what the beetle larvae contribute to the crows’ overall nutrition. They were ready to do that because the larvae carry nitrogen-fixing symbionts, which shows up within the blood and feathers of crows who eat them but are absent in people who lack the tool skills to get at the larvae.

Rutz discovered only a few larvae can satisfy a crow’s energy needs for a complete day, meaning a crow can shortly make up for the large amount of time it had to position into getting the larvae. Nothing the crows would otherwise eat can compare to the raw energy content of the beetle larvae, which gives a big advantage to crows that may use tools.

Let’s just hope it’s not too much of an evolutionary advantage, in any other case we might be gazing a nightmarish Planet of the Crows scenario in a couple of million years. There’s a reason a gaggle of crows is known as a murder, in fact.

[ Science ]

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This post is tagged: amount of time, animal kingdom, energy content, evolutionary advantage, particle accelerator, science source