Smart mating: the cognitive ability of females influences their preference for male cognitive ability.

"Conflict of interest: The authors declare no conflict of interest."

"FUNDING This work was supported by the Spanish Ministerio de Ciencia, Innovación y Universidades (PGC2018-095412-B-I00 and RYC-2015–18317) and the Consellería de Cultura, Educación e Ordenación Universitaria, Xunta de Galicia (ED431F 2017/07). N.A.Q. was supported by FPI student grant from the Ministerio de Ciencia, Innovación y Universidades (BES-2016–078894). Funding for open access charge: Universidade de Vigo/CISUG. We would like to thank Jose C. Noguera and Belén Otero for their help during the study and J. Keagy and an anonymous reviewer for their constructive comments on an earlier version of the manuscript. Conflict of interest: The authors declare no conflict of interest. Ethical considerations: This experiment was approved by the Animal Experiment Ethics Committee of the Universidade de Vigo and the Xunta de Galicia (ES360570181401/19/FUN01/BIOL AN.08/SYK). Data accessibility: Analyses reported in this article can be reproduced using the data provided by Álvarez-Quintero et al. (2021)."