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Optimal foraging theory (OFT) holds that animals' foraging behaviors reflect cost-benefit trade-offs that vary by species and with dynamic ecological circumstances. One such circumstance is lunar intensity, which Mahmoud-Reza Hemami and colleagues found to be negatively associated with foraging by Iranian jerboas but Deborah J. Curtis and colleagues found to be positively associated with foraging by mongoose lemurs. This discrepancy is explicable in terms of the lemurs' greater reliance on vision means that higher lunar intensity benefits them more than it benefits the jerboas.