Duck Is The Common Name Of An Important Number Of Anseriform Birds, Generally Migratory, Belonging To The Anatidae Family. Royalty-Free Stock Photo

Duck is the common name of an important number of anseriform birds, generally migratory, belonging to the Anatidae family.. It is a definition devoid of systematic value, as it groups species belonging to various different genera and sub-families; in general the term & x22;duck& x22; applies to the smaller Anseriform species with marked sexual dimorphism, as opposed to goose, which on the contrary defines species of great size and without dimorphism