Grizzly Bears
- Fact sheet about biology, ecology, and conservation status of Ursus arctos, from the Columbia Mountains Institute of Applied Ecology, British Columbia.
- http://www.cmiae.org/grizzlyinfo.htm

Sierra Club Grizzly Bear Ecosystems Project
- Working to protect and restore wild grizzly populations in the lower forty-eight United States and Canada.
- http://www.sierraclub.org/grizzly/

Shadow of The Bear
- Photos and information about the Kodiak brown bear, Ursus arctos middendorffi.
- http://www.shadowofthebear.com

Interagency Grizzly Bear Committee
- United States government group leading the recovery of the grizzly bear (Ursus arctos) in the lower 48 states. Research activities, newsletters, bear safety advice, and online training to learn to identify different bear species in the wild.
- http://www.fs.fed.us/r1/wildlife/igbc/

Grizzly Bear (Ursus arctos horribilis)
- Information from the US Fish and Wildlife Service.
- http://endangered.fws.gov/i/A4I.html

Grizzly Bear (Ursus arctos) - ThinkQuest
- Discusses grizzly bear appearance, habitat, feeding, hibernation and reproduction.
- http://library.thinkquest.org/11234/brown_any.html

Grizzly Bear Reintroduction - Bitterroot Coalition
- National Wildlife Federation project reintroducing the grizzly to the Bitterroot ecosystem (Central Idaho, USA).
- http://www.nwf.org/grizzly/

Grizzly Bear - Kamchatka: Grizzlies of the Russian Far East
- An in-depth study of grizzly bear behaviour and cub reintroduction program.
- http://www.cloudline.org/

Grizzly Bear - Eastern Slopes Grizzly Bear Project
- Studying effects of human developments and activities on grizzly bears in the Central Rockies Ecosystem.
- http://www.canadianrockies.net/Grizzly/