Science
- 683
- Encyclopedia Smithsonian: Passenger Pigeon
- Summary of the biology and extinction of the species, including a description of their exhibit of Martha, the stuffed remains of the last living specimen of the species.
- 684
- Extinction: The Story of the Passenger Pigeon
- Brief history of the events leading up to the extinction.
- 685
- The Passenger Pigeon
- A different view of the demise of the passenger pigeon, which argues that the bird's way of life also doomed it.
- 686
- Wikipedia: Passenger Pigeon
- Encyclopedia article that talks about the life and eventual extinction of this bird.
- 687
- Antarctic Penguins (Adelies and Emperors)
- Photos of Adelie and Emperor penguins taken over 3 stays in Antarctica (18 months total), in winter and also underwater. Some recorded calls of adults and chicks.
- 688
- Oamaru Blue Penguin Colony
- Site of a former New Zealand rock quarry that was turned into a blue penguin colony and tourist attraction. Includes webcams, research, and links.
- 689
- Penguin Science
- A collection of articles and research concerning various aspects of penguin behavior.
- 690
- Penguins Home
- Basic overview of the animal with links to other websites and upcoming television specials about the bird.
- 691
- Penguins in Antarctica
- Characteristics, habitat, reproduction, species, and pictures of each species.
- 693
- Columba livia (Rock Dove, Common Pigeon)
- Description and biology of this common bird, which is found worldwide.
- 695
- Kereru, the New Zealand pigeon
- Includes general information about the bird, taxonomy, description, breeding, diet, and why conservation is important.
- 697
- Scaled Pigeon
- Brief Wikipedia article explains where it lives and breeds, what it looks like, what it eats, and how it flies.
- 698
- White-crowned Pigeon
- Has photographs, audio file, identification tips, location maps, and life history.