Colymbiformes
Colymbiformes is a disused order of birds that was once used to classify grebes and loons. Scientific study has revealed that these two types of waterbirds are not so closely related; they have been reclassified in the orders Podicipediformes and Gaviiformes, respectively.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d3/Gr%C3%A8be5.jpg/220px-Gr%C3%A8be5.jpg)
References[edit]
- "Colymbiformes". Encyclopædia Britannica. 2005. Encyclopædia Britannica Premium Service.