Tag: Kestrel

First evidence of sex differences in the durationof avian embryonic period: consequences forsibling competition in sexually dimorphic birds

Kestrel (Falco tinnunculus) Science Article 7 abstract Parental favoritism in birds would be enhanced if parents can control any egg feature influencing the ontogeny of the embryo during incubation. Egg size and composition may influence the duration of incubation and hatching periods, and eggs bearing embryos of different sex may differ in size and composition. […]