Balaenopteridae Family - Family overview and species accounts for all six members - Minke, Sei, Bryde's, Blue, Fin, and Humpback Whales. - http://animaldiversity.ummz.umich.edu/chordata/mammalia/cetacea/balaenopteridae.html
Rorquals - Drake Bay, Costa Rica - Description and 47 photographs from a whale watching trip. - http://www.divinedolphin.com/Rorquals/