Platypus
- Ryan Benrud provides information on Ornithorhynchus anatinus, its classification, habitat, adaptation, nutrition, reproduction and other interesting facts.
- http://acadweb.uwlax.edu/07Spring/SAH/BIO203/benrud_ryan/

Amazing Animals: Duck-billed Platypus
- Information on this semi-aquatic mammal found in Australia.
- http://www.bbc.co.uk/nature/reallywild/amazing/platypus.shtml

Australian Platypus Conservancy
- Information about the platypus (Ornithorhynchus anatinus), research, its conservation and protection, and platypus-spotting opportunities. Also offers merchandise for sale.
- http://platypus.asn.au/

Platypus Tropical Research
- Information, field research trips, first platypus research project in Tropical North Queensland.
- http://www.wildscapes-safaris.com.au/tpresearch.htm

Sleep of the Platypus
- Article by Henry Gee about the sleeping patterns of the platypus as compared with other mammals.
- http://helix.nature.com/nsu/980813/980813-5.html

Rainforest Platypus
- Rainforest Platypus, photos and text. Courtesy of Chambers Wildlife Rainforest Lodge, Atherton Tableland, Far North Queensland, Australia
- http://www.rainforest-australia.com/platypus.htm

What is a Platypus?
- Etymology and a reading list.
- http://www.platypuscomputing.com/platwhat.html

Duck-Billed Platypus (Ornithorhynchus anatinus)
- Duck-Billed Platypus facts, photos and message board.
- http://www.thebigzoo.com/Animals/Duck-Billed_Platypus.asp