Encyclopedia of Life: http://eol.org/pages/1049263/overview
Brief introduction: The red junglefowl (Gallus gallus) is a tropical member of the Phasianidae family. It is thought to be ancestral to the domestic chicken. The red junglefowl was first domesticated at least five thousand years ago in Asia, and then taken around the world. The domestic form is kept globally as a very productive food source of both meat and eggs.
Zhang et al., Comparative Genomics Reveals Insights into Avian Genome Evolution and Adaptation. Science, (2014).
Jarvis et al., Whole Genome Analyses Resolve Early Branches in the Tree of Life of Modern Birds. Science, (2014).
Hillier et al., Sequence and comparative analysis of the chicken genome provide unique perspectives on vertebrate evolution. Nature, (2004).