Roberto Sacchi

TL;DR: Relationships between song structure and social context suggest that some features, such as the rattle, might have originally evolved to serve in male-male interactions; a female preference may have further promoted song evolution leading to complex syllable repertoires.

TL;DR: The results showed that simple rules such as residency and body size differences could determine the outcome of agonistic interactions: residents were more aggressive than intruders, and larger males were competitively superior to smaller males, suggesting that color polymorphism in this species is not a signal of status or fighting ability in intermale conflicts.

TL;DR: There was a positive relationship between both bird number and flock number and the abundance of buildings constructed before 1936 and this indicated active selection of old buildings by feral pigeons.

TL;DR: Nestlings signal their need by increased solicitation, and parents allocate food to offspring dependent on both need and condition, with these effects depending on parental workload as determined by experimental brood size.

TL;DR: This study illustrates how divergence in sexually selected traits via male competition can determine the direction and extent of introgression, contributing to geographic patterns of genetic and phenotypic diversity.