The original publication is available at www.springerlink.com via the following link: http://www.springerlink.com/content/qwr1274510g78285/ Rosivall, B., Szöllősi, E., Hasselquist, D, Török, J. (2010): Males are sensitive – sex-dependent effect of rearing conditions on nestling growth. Behavioral Ecology and Sociobiology 64(10):1555-1562. DOI 10.1007/s00265-010- 0969-1