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When ants are confronted with information overload and face too many decisions -- about where to live, for instance -- they revert to the wisdom of the crowd.

Despite having a brain smaller than the point of a pin, one ant species uses an elaborate system of sending out scouts to look for new homes. The scouts report back, and then the whole colony votes, according to researchers at Arizona State University.

The ants use chemistry and crowdsourcing, wrote associate professor of biology Stephen C. Pratt and graduate student Takao Sasaki at Arizona State University, in the current issue of Current Biology.