Ants Can Expect the Time of an Event on Basis of Previous Experiences

Figure 2

(a) Mean number of Myrmica ruginodis (-axis) counted 10 times on the food site, at five successive potential food delivery times (-axis), the effective food delivery time being delayed for 20 minutes each day. After two training days, the ants were more numerous in coming on the site at the expected time. (b) Regression lines of the maximum number of ants present each day on the food site (-axis) in function of the logarithm of the number of training days (-axis). The maximum number of ants increased linearly with these logarithms.

(a)

(b)