International Association for Bear Research and Management
The Bear Specialist Group (BSG) is part of The International Union for the Conservation of Nature (IUCN) and the Species Survival Commission. The goal of the BSG is to promote the conservation of bears and the habitats that they require across their distribution world-wide.
http://www.bearbiology.com/
Arkive
A unique searchable collection of thousands of wildlife videos, images and fact-files, with a special focus on the world's threatened species.
http://www.arkive.org/
Mongabay
An excellent resource for all environmental news.
http://news.mongabay.com/
IUCN Red List
the IUCN (international union for conservation of nature) red list with searchable database of all listed species.
http://www.iucnredlist.org/
IUCN
The international union for conservation of nature.
http://www.iucn.org/
CITES
The convention on international trade in endangered species of wild fauna and flora.
http://www.cites.org/