Animal Hearing websites

Take a look at the websites below as you research. Are the reliable?

Elephants

http://www.animalfactguide.com/animal-facts/african-elephant/
http://www.elephantexperts.org/senses.html
https://wonderopolis.org/wonder/why-do-elephants-have-big-ears-2
https://www.mnn.com/earth-matters/animals/photos/12-facts-change-way-see-elephants/elephants-can-hear-through-their-feet

Dog

https://www.doghealth.com/ears/hearing-in-dogs
http://scienceline.ucsb.edu/getkey.php?key=596
https://wonderopolis.org/wonder/how-can-dogs-hear-things-we-cant-2

Dolphin

http://www.ducksters.com/animals/dolphin.php

https://seaworld.org/en/animal-info/animal-infobooks/bottlenose-dolphins/senses

https://wonderopolis.org/wonder/how-do-dolphins-use-echolocation

https://seaworld.org/en/animal-info/animal-infobooks/bottlenose-dolphins/communication-and-echolocation

Bat

http://www.kidzone.ws/animals/bats/facts8.htm

http://discoverykids.com/articles/are-bats-really-blind/

https://wonderopolis.org/wonder/do-bats-need-maps