The size of a human fingernail, this tiny glass frog in Costa Rica is a wonder to watch. In this clip from the Discovery Channel’s Speed of Life, you can see the glass frog’s rice grain-sized, red heart and internal organs through its translucent belly skin.
Costa Rica has 13 species of glass frogs, and there are more than 100 species across Central and South America. However, because they are small, arboreal, nocturnal, and can live in extreme, wet areas, they can be hard to spot. Luckily, we have the internet:
Because of the secretive behavior of this bird, it is often only detected by the distinctive bell-like call given by the males. At close range, the vocalization of many in Costa Rica is heard as a complex three-part song, the “bonk” giving the bird its name. This hollow, wooden “bonk” is thought to be among the loudest bird calls on Earth, audible to humans from over 0.5 mi (0.80 km) away.
The Blue Morpho Butterfly is a beautiful brown — yes, brown — butterfly. The microscopic scales on this rainforest butterfly manipulate light, reflecting back an intense blue light that makes them appear blue.
Normally, these little guys would be vulnerable to being picked up by predators such as vultures, sea gulls, raccoons, possums, coyotes, and people. But this is a very lucky nest of Olive Ridley Sea Turtle hatchlings; they are making their way to the water across a Costa Rican beach from a protected nest, under the watch of volunteers.