No. Grebes and swans are two different species in to different families. The grebe is from the family Podicipedidae, and the swan in from he family Anatidae.
There are hundreds - if not thousands of them. And what do you call a 'water bird'? There are ducks, geese and swans, rails, divers (loons), grebes, waders, herons, egrets, storks and so on...
ducks, geese and swans spoonbills herons storks ibises waterfowl such as swamphens and moorhens cranes pelicans grebes cormorants sandpipers snipes
the pied billed grebes common name is sex
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Grebes are small water birds similar to ducks. They do have a tail, but it is very short and stubby and not obvious when you look at these birds.
Grebes can be found in freshwater lakes, ponds, marshes, and open water habitats. They are commonly seen in North America, Europe, Asia, Africa, and Australia. Grebes tend to prefer areas with abundant aquatic vegetation and shallow water.
High levels of DDT found in grebes can be due to bioaccumulation, where the pesticide builds up in the food chain reaching toxic levels in top predators like grebes. Grebes consume contaminated fish and aquatic insects which leads to a high concentration of DDT in their bodies. Efforts to decrease the use of DDT and monitor its presence in the environment are important to protect wildlife like grebes.
There are many kinds of water birds; salt water and fresh water. Many are ducks and gulls. There are also Penguins, terns and boobies. Herons/cranes and pelicans also classify. Loons and cormorants are water birds. There are hundreds of water bird species around the world, and it's wonderful to read about them all.
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