TY - RPRT TI - Ornament, armament, or toolkit? Modelling how population size drives the evolution of birdsong, a functional cultural trait AU - Hudson, E. J. AU - Creanza, N. PY - 2021 DO - 10.1101/2021.04.29.442039 UR - https://www.biorxiv.org/content/10.1101/2021.04.29.442039v1 ID - 10.1101/2021.04.29.442039 ER -