Loons and Grebes
Families: Podicipedidae, Gaviidae
Loons are medium to large birds with dagger like bills that they use to capture fish underwater. In North America there are 5 spices in one genus.
Grebes are diving birds that have lobed feet, long necks, and sharp bills that they use to capture prey. In North America there are 7 species in 4 genera.