Here we go:
The group of waterfowl know as the dabbling ducks includes 10 species that commonly occur in Canada...<snipped>...This group of birds feed at or near the surface by filtering food items such as invertebrates, seeds and other plant materials from the water. This feeding behaviour is referred to as "dabbling" and dabbling ducks can frequently be seen 'tipping-up', or tipping up-side down, in the water to reach food at the bottom of a pond. All dabbling ducks have bills that are specially designed to remove food particles from the water using plates aligned along the edge of their bill, much like the baleen of whales.
Found here:
http://www.sfu.ca/biology/wildberg/species/dabbducks.html
The group of waterfowl know as the dabbling ducks includes 10 species that commonly occur in Canada...<snipped>...This group of birds feed at or near the surface by filtering food items such as invertebrates, seeds and other plant materials from the water. This feeding behaviour is referred to as "dabbling" and dabbling ducks can frequently be seen 'tipping-up', or tipping up-side down, in the water to reach food at the bottom of a pond. All dabbling ducks have bills that are specially designed to remove food particles from the water using plates aligned along the edge of their bill, much like the baleen of whales.
Found here:
http://www.sfu.ca/biology/wildberg/species/dabbducks.html