Experiments testing for variance-sensitivity (also called risk-sensitivity) usually offer 2 options delivering identical expected payoffs, with one option providing a constant and the other one a variable reward or delay. Animals often show a preference for the constant option when variance is...

The desert ant Cataglyphis exhibits a strong tendency toward returning to its previous foraging direction when the last foraging run was successful. This behavior is called sector fidelity. A very simple behavioral rule, the τ-rule, has previously been identified as the possible underlying...