Some observations on the incubation behaviour of the domestic duck

animal animal developmental stages animal domestique animales animales de caza animals anseriformes aves de caza aves de corral aves domesticas behaviour birds canard comportamiento comportement developmental stages domestic animals domesticated birds ducks etapas de desarrollo etapas de desarrollo de la planta etapas del desarrollo animal fisiologia fonction physiologique game game birds gametes gametos gibier oiseau oiseau domestique ova ovule pato physiological functions physiologie physiology plant developmental stages poultry reproduction vertebrados vertebrates vertebre volaille