- Das Wolf Conservation Center:https://www.wolfconservationcenter.org
- National Geographic:https://www.nationalgeographic.com
- Verteidiger der Tierwelt:https://defenders.org
- The Nature Conservancy:https://www.nature.org
- Internationales Wolfzentrum:https://www.wolf.org
- Der World Wildlife Fund:https://www.wwf.org
- Wolfquest:https://www.wolfquest.org
- Alaska Department of Fish and Game:https://adfg.alaska.gov
- Canadian Wildlife Federation:https://cwf-fcf.org