Genes that underlie the capacity to receive, use and transmit information are the evolving properties.

Males transmit signals in courtship through behavioral displays.

The process of speciation is completed with the cessation of genetic exchange.

The theory of founder effects does not explain how novel features like plumage traits arise.

Species can be recognized by their morphological characteristics and songs.

Plumage features constitute a major component of courtship signals.

Almost nothing is known from hybridization studies about the inheritance of

Exchange of breeding individuals between two populations tends to homogenize their gene pools.