TY - JOUR T1 - The evolution of sex roles in birds is related to adult sex ratio. JO - Nat Commun PY - 2013/01/01 AU - Liker A AU - Freckleton RP AU - Székely T ED - DO - DOI: 10.1038/ncomms2600 VL - 4 SP - 1587 Y2 - 2024/10/19 ER -