Rebecca Cliffe

Dr. Rebecca Cliffe is a British conservation biologist and leading authority on sloth ecology. She began her work in Costa Rica at age 18 and has since dedicated her career to understanding and protecting wild sloths.

Rebecca holds a PhD in Bioscience from Swansea University and is the founder of The Sloth Conservation Foundation (SloCo), a research-driven nonprofit based in Costa Rica. She pioneered the first long-term field studies of wild sloths, a program that continues to this day. This work now constitutes the most comprehensive dataset on sloth ecology in existence, and continues to guide conservation research, policy and practice.

Her work has informed national wildlife regulations and helped secure new legal protections for sloths. Rebecca received the Future For Nature Award in 2022 and an honorary Doctor of Science in 2024. She has been featured on NBC’s Today Show and 60 Minutes, is the author of Life in the Slow Lane, and inspired the children’s book The Adventures of Dr. Sloth.

Rebecca leads one group tour

Costa Rica is a tropical paradise, whilst small it punches well above its weight when it comes to wildlife and biodiversity. Nowhere is this experienced more keenly than the Osa Peninsula in the country’s south-west, jutting out into the Pacific Ocean and the setting for our Festival of Wildlife in 2027. Find out more about Festival of Wildlife Costa Rica

Destination: Costa Rica
Price (inc. flights): 11 days from £9,745
Trip type:
Group Tour
When to go:
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D