These datasets contain data from: Cheng and Martin 2012, Nest Predation Risk and Growth Strategies of Passerine Species: Grow Fast or Develop Traits to Escape Risk? American Naturalist Data collector: Yi-Ru Cheng and Thomas E. Martin, e-mail: yirucheng@gmail.com Datasets are saved as CSV file. There are no special symbols for missing data. The dataset called "differential growth data" has the following columns: 1)spp_code: abbreviation of species name 2)common_name: common name of study species 3)scientific_name: scientific name of study species 4)age_F: the day when nestlings fledge 5)Km: growth rate constant (k) for body mass 6)Kt: growth rate constant (k) for tarsus length 7)Kw: growth rate constant (k) for wing_chord length (measurment of 9th primary feather) 8)pro_wing_70m: proportion of wing length reached when nestlings grow to 70% of their body mass relative to adult size 9)pro_tarsus_70m: proportion of tarsus length reached when nestlings grow to 70% of their body mass relative to adult size 10)pro_mass_F: proportion of mass relative to adult mass at the day of fledging 11)pro_wing_F: proportion of wing length relative to adult wing length at the day of fledging 12)pro_tarsus_F: proportion of tarsus relative to adult tarsus at the day of fledging 13)age_H: day when homeothermy index of nesltings reached 0.9 14)pro_mass_ageH: proprotion of mass reached when homeothermy index of nestlings reached 0.9 The dataset called "appendix A_adult size" has the following columns: 1)spp_code: abbreviation of species name 2)common_name: common name of study species 3)scientific_name: scientific name of study species 4)adult_mass: adult mass of species (unit: g) 5)adult_tarsus: adult tarsus length of species (unit: mm) 6)adult_wing: adult wing length of species (unit: mm)