The duck family is the most diverse of the order Anseriformes. It includes about 150 species. Photographers of the bird stock photo agency BIA - birdimagency have captured 12 of these species artfully for you. Calvendo calendars are premium products - a bit more pricey than others but with added benefits: Our calendars always look beautiful on your wall because we produce them locally with premium paper and sophisticated spiral binding, ensuring easy turning of pages and flat hanging against the wall. A protective transparent plastic cover sheet provides added stability. Treat yourself to a Calvendo calendar and you get something that looks better all year round.