In our recent paper [1], we presented a novel test to show that New Caledoniancrows can select tools in preparation for specific future events. The test con-sisted of a temporal sequence where the crows were (i) shown a baitedapparatus that varied in the test condition between two tool-apparatus combi-nations, (ii) 5 min later given a choice between five objects and (iii) 10 min latergiven access to the apparatus. Crows were able to choose the right tool for eachspecific apparatus they had seen 5 min earlier. This experimental designallowed us to empirically evaluate the hypothesis that the amount of pastreinforcement associated with different objects affects the choice of functionaltools when subjects solve variants of the spoon test [2]. We argue that ourresults demonstrate that New Caledonian crows are an excellent candidatefor testing the conservative criteria for mental time travel [3].