References:
Extinct
Endangered:
Threatened:
Photos:
*If a source is not as valid as the others.
- Natural History Museum http://www.nhm.ac.uk
- Oxford University http://www.oum.ox.ac.uk
- Science Discovery Channel http://science.discovery.com
- Wild Birds Unlimited http://www.wbu.com
- Stanford University http://www.stanford.edu
- Bird Life http://www.birdlife.org
- Natural History Museum http://www.nhm.ac.uk
- HubPages* http://hassam.hubpages.com/
- About.com* http://animalrights.about.com
- Bagheera* http://www.bagheera.com
- A-Z Animals* http://a-z-animals.com
- The Sixth Extinction* http://www.petermaas.nl
Endangered:
- Oxford University http://www.oum.ox.ac.uk
- National Geographic http://animals.nationalgeographic.com.au
- World Wild Life https://worldwildlife.org
- National Geographic http://animals.nationalgeographic.com.au
- Care 2* http://www.care2.com
- Biology Online* http://www.biology-online.org
- Wild Life* http://www.allaboutwildlife.com
- Enchanted learning* http://www.enchantedlearning.com
Threatened:
- World Wild Life https://worldwildlife.org
- Biology Online* http://www.biology-online.org/
- Care 2* http://www.care2.com
Photos:
- The Dodo Image Gallery http://www.davidreilly.com
- Rewilded http://www.wildlifeextra.com
- World Wild Life https://worldwildlife.org
*If a source is not as valid as the others.