* The Encyclopedia of Life (EOL)
* Animal Diversity Web (ADW)
* Grzimek's Animal Life Encyclopedia
* Scientific journals: These contain research articles and studies on specific animal species, including those with long necks. Some relevant journals include:
* Journal of Zoology
* Biological Journal of the Linnean Society
* Journal of Mammalogy
* Websites and online resources: There are many websites and online resources dedicated to animals and wildlife, some of which provide information on animals with long necks. Some examples include:
* The National Geographic website
* The World Wildlife Fund website
* The Smithsonian Institution website
* Wikipedia
* Field guides and nature guides: These provide information on identifying and observing animals in their natural habitats, and may include species with long necks. Some examples include:
* The Peterson Field Guide Series
* The Audubon Field Guide Series
* The National Audubon Society Field Guide to North American Birds
* Zoos and aquariums: Many zoos and aquariums have exhibits featuring animals with long necks, such as giraffes, ostriches, and camels. These facilities often have educational programs and resources available for visitors.