Tawny owl Color-specific offspring body mass

Fledging Body Mass: mass at fledging (g); Year: Year when the experiment was performed; BroodID: identity of the nest where fledglings were raised; Hour: time of the day when weighed; Wing: wing length (mm); Sex: sex of the fledgling; Cross fostered: No is for when fledglings were raised by their biological parents and Yes is for when fledglings were raised by foster parents; Father and mother color: 1 for dark melanic to 5 for light melanic; Treatment: brood size manipulation experiment