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/