Top models explaining variation in egg mass, yolk androgens and survival, identified using the information-theoretic approach and Akaike's Information Criterion adjusted for small sample size (AICc).

k is the number of parameters in the model, Wi is the Akaike weight calculated over all candidate models and the evidence ratio reflects the relative likelihood that model i is better than the best model (see Methods for details). “Egg” refers to A or B egg, “chick” refers to A or B chick.