Anseriformes are aquatic birds containing ducks, geese and other water fowl. There are 161 species in this order. They live in bodies of freshwater such as ponds, lakes, rivers and marshes. They have adapted feet to help move in water. Anseriformes build their nest on water or near water out of plants. Most anseriformes eggs are incubated for 22-47 days. most anseriformes are herbivores but some eat small fish insects and plankton as well. They are medium to large birds that can be 30-180 cm tall. They can weigh from 230 g-22.5 kg.