Bull ants wait for twilight before they start foraging for food, instead of just relying on their body clocks or the temperature, according to a study from The Australian National University.

The study was led by Dr Ajay Narendra of The Vision Centre at the Research School of Biology at ANU.

It shows that instead of just relying on their circadian rhythms to identify their foraging time or reacting to specific temperature changes, the bull ant, Myrmecia pyriformis, is actually keeping a close eye on ambient light levels

http://news.anu.edu.au/?p=1925

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