This sloth is so tiny it can fit in a coffee cup.
When you're this cute and you fit into a coffee cup, photos will be taken. (Photo: Sam Trull/The Sloth Institute)

With their sweet, squishy faces and lazy movements, sloths are one of the most squee-worthy animals on the Internet. (Just ask Kristen Bell). Sadly, these sluggish tree-dwellers are also increasingly threatened in their native forests of Central and South America.

Inspired by their cuteness and a desire to make a difference, wildlife conservationist and photographer Sam Trull (pictured) has dedicated her career to saving these charismatic animals.

Trull was first introduced to the wonderful world of sloths in 2013 after arriving in Costa Rica to work for a small wildlife rehabilitation clinic called Kids Saving the Rainforest. It wasn't long before she realized that working with orphaned sloths was her true calling.

In August 2014, she founded The Sloth Institute Costa Rica with fellow sloth enthusiast Seda Sejud, and the pair have been rescuing, rehabilitating and releasing baby sloths ever since.

Who can resist a slothy face like that?
Who can resist a face like that? (Photo: Sam Trull/The Sloth Institute)

In her new photo book "Slothlove," we get an intimate look at what it's like to spend every day hanging out with such fascinating creatures.

"Through sharing these photos, I hope to inspire a generation of sloth fans that appreciate why these creatures are so special and feel engaged to help further the conservation of sloths in Costa Rica and around the world," Trull writes.

What's better than a cuddly sloth? Three cuddly sloths!
What's better than a cuddly sloth? Three cuddly sloths! (Photo: Sam Trull/The Sloth Institute)

After seeing so many adorable sloth photos, you might feel compelled to visit the institute and meet these lazy residents for yourself — but don't book your plane tickets just yet. The facility is not open to the public because it's technically not a sloth sanctuary.

The institute's mission is to rescue and rehabilitate sloths with the intention of eventually releasing them back into the wild. Because of this, it's in the sloths' best interest to have as little contact with humans as possible.

Chuck the sloth cuddles up with Ellen the bear.
Chuck the sloth cuddles up with Ellen the bear. (Photo: Sam Trull/The Sloth Institute)

Despite the no-visitor policy, there are many ways you can help the animals at the institute — from "adopting" a sloth, donating supplies, volunteering on-site and, of course, buying a copy of "Slothlove."

In the meantime, continue below to see more heart-melting photos of baby sloths:

Locket and Elvis cuddle up in a box.
(Photo: Sam Trull/The Sloth Institute)

A pair of sloths named Locket and Elvis cuddle together in a box.


Tiny sloth smiles while sleeping.
(Photo: Sam Trull/The Sloth Institute)

A tiny newborn sloth cracks a smile in its sleep.


Kermie the baby sloth shows off his adorable foot.
(Photo: Sam Trull/The Sloth Institute)

Kermie the baby sloth shows off his adorable foot.


Sloth with flower in mouth.
(Photo: Sam Trull/The Sloth Institute)

That's one suave sloth!


Sweet little sloth face.
Sweet little sloth face. (Photo: Sam Trull/The Sloth Institute)