International Sloth Day

International Sloth Day takes place on the third Thursday of October. Sloths are mammals famous for their slow movements, and they inhabit the tropical forests of Central and South America. There are two main types of sloths: two-toed and three-toed. Although they may resemble monkeys, their closest living relatives are anteaters and armadillos.

History of International Sloth Day

International Sloth Day was created by the AIUNAU Foundation, an organization dedicated to conserving and restoring Colombia’s wildlife. AIUNAU began working with sloths in 1996 to rescue, rehabilitate, and protect these unique animals.

Sloths are slow-moving mammals that travel only about 40 yards (37 meters) per day while feeding on leaves. They have an exceptionally low metabolic rate, allowing them to sleep for up to 15 to 20 hours a day. Despite their slow pace on land, they are surprisingly strong swimmers.

Unfortunately, when sloths leave the safety of the rainforest canopy and move across the ground, they become vulnerable to predators. Their long limbs are adapted for hanging from branches rather than supporting their body weight. Their muscles account for only about 25 to 30% of their body weight, compared with approximately 40 to 45% in most other mammals.

Interesting Facts About International Sloth Day

• The oldest known sloth, Paula, lived at a zoo in Germany and reached the remarkable age of 53.
• Sloths spend most of their lives hanging in trees.
• Sloth fur supports a unique ecosystem of algae, moths, beetles, and other tiny organisms. The algae give their fur a greenish tint that helps camouflage them among the leaves.
• Thanks to the structure of their neck vertebrae, many sloths can rotate their heads up to about 270 degrees.

How to Take Part in International Sloth Day

Take some time to slow down and enjoy a more relaxed pace. Spend time outdoors, read a favorite book, or simply unwind without rushing. You can also learn more about sloths and the conservation efforts that protect their rainforest habitats, create sloth-themed crafts, or watch family-friendly films featuring sloths, such as “Ice Age.”

When Is International Sloth Day in 2026?

International Sloth Day is observed on the third Thursday of October each year.

Observations