Web articles on Glass Frog. 


https://featuredcreature.com/glass-frog-looks-like-glowing-constellation-rainforest/
https://www.zmescience.com/ecology/animals-ecology/glass-frog-transparent-43242/
https://www.wired.com/2016/09/glass-frog-doesnt-care-can-see-guts/
https://www.sciencenews.org/article/glass-frog-wears-its-heart-all-see?mode=magazine&context=193345