The data file is associated with the paper C. Lucass, P. Korsten, M. Eens, W. Müller "Within-family parent-offspring co-adaptation in a wild bird: on static traits, behavioural reaction norms and sex differences". It contains data of a co-adaptation study in wild blue tits. Further information are provided in the paper. Sheet 1: Static This sheet contains the following variables (more information on how the static data were obtained can be found in the paper): ID: The Nest ID, a factor Dyad: The ID of a Dyad (two nests where clutches were swapped reciprocally), a factor Year: The Year, a factor BS_genetic: The begging scores obtained from genetic chicks (that were raised in the foster nest) (static values) BS_foster: The begging scores obtained from foster chicks (that were raised in the focal nest) (static values) FR: Feeding (=provisioning) rate [visits / min] of individual parents (static values) Sex: Parental sex Sheet 2: Responsiveness This sheet contains the following variables (more information on how the responsiveness data were obtained can be found in the paper): ID: The Nest ID, a factor Dyad: The ID of a Dyad (two nests where clutches were swapped reciprocally), a factor Year: The Year, a factor Beg_resp_genetic: The begging responsiveness obtained from genetic chicks (that were raised in the foster nest) Beg_resp_foster: The begging responsiveness obtained from foster chicks (that were raised in the focal nest) Feeding_resp: Feeding (=provisioning) responsiveness of individual parents Sex: Parental sex ********************************* CONTACTING ********************************** Contact me at: Carsten Lucass Ethology group / Department of Biology University of Antwerp Campus Drie Eiken, Building C - Room 1.25 Universiteitsplein 1 B-2610 Antwerp (Wilrijk) Mail: Carsten.Lucass@uantwerpen.be Tel: +32 (0)3 265 22 67 Fax: +32 3265 22 71