Some observations on the nest building behaviour of the domestic duck

alojamiento de animales animal animal domestique animal housing animales animales de caza animals anseriformes aves de caza aves de corral aves domesticas behaviour birds buildings canard comportamiento comportement construcciones domestic animals domesticated birds ducks game game birds gibier housing logement logement des animaux nesting nidification oiseau oiseau domestique pato poultry vertebrados vertebrates vertebre vivienda volaille zootechnie zootechny zootecnia