Spring triggers selective pressures related to the reproduction of birds. These selective pressures have as a consequence the existence of processes such as competitions, divorces, abandonments or infidelities. These processes are responsible, to a large extent, for the adaptation to the environment and the conservation of the populations. The fulfillment of the current hunting season law that bans hunting in spring during the reproduction period facilitates the maintenance of natural populations with a high capacity for adaptation.
Pérez-González J. 2010. Reproducción de aves cinegéticas, leyes naturales. La Caza y su Mundo, 27: 24-29.
Find out more here (article in Spanish): http://macondo.biz/grinref/files/2010/04/mayo.2010.pdf