
Mario Jorge Baudoin Weeks was a Bolivian biologist and conservationist known for his research in Bolivia and Costa Rica. He was the first director of Bolivia's national park system, and served as director of several academic and government institutes, including the Museo Nacional de Historia Natural de Bolivia, the Institute of Ecology at Higher University of San Andrés, Dirección Nacional Conservación de Biodiversidad (DNCB) and the La Selva Biological Station in Costa Rica. In the early 1990s he was involved in the creation of the Servicio Nacional de Áreas Protegidas (SERNAP), which led to the 1995 establishment of Madidi National Park. He received the 2008 Distinguished Services Award from the Society for Conservation Biology.

Niloufar Bayani is an Iranian wildlife activist and researcher. She was convicted in 2019 of espionage by Iranian authorities in a closed-door trial in Iran, and received a 10-year prison sentence.

Mary Etherington was an English horse breeder from Withypool credited with reviving the Exmoor pony population after World War II. She and her husband, James Grant Speed (1906-1980) co-founded the Exmoor Pony Trekking Society at the Royal (Dick) School of Veterinary Studies now part of the University of Edinburgh.

Exequiel Ezcurra is a Mexican plant ecologist and conservationist. His highly interdisciplinary work spans desert plant ecology, mangroves, island biogeography, sea birds, fisheries, oceanography, and deep-sea ecosystems.

Paula Kahumbu is a wildlife conservationist and Chief Executive Officer of WildlifeDirect. She is best known as a campaigner for elephants and wildlife, spearheading the Hands Off Our Elephants Campaign, which was launched in 2014 with Kenyan First Lady Margaret Kenyatta.

Yolanda Kakabadse Navarro is an Ecuadorian conservationist of Georgian descent.

Karen R. Lips is a Professor of Biology at University of Maryland, College Park. Lips' work more than 20 years ago eventually contributed to the identification of the chytrid fungus as the primary cause of frog decline worldwide.

Roberto Burle Marx was a Brazilian landscape architect whose designs of parks and gardens made him world-famous. He is accredited with having introduced modernist landscape architecture to Brazil. He was known as a modern nature artist and a public urban space designer. His work had a great influence on tropical garden design in the 20th century. Water gardens were a popular theme in his work. He was deftly able to transfer traditional artistic expressions such as graphic design, tapestry and folk art into his landscape designs. He also designed fabrics, jewellery and stage sets.

Seub Nakhasathien was a Thai conservationist, environmental activist, and scholar who is renowned for his effort to protect Cheow Lan Lake, Thungyai Naresuan Wildlife Sanctuary, and Huai Kha Khaeng Wildlife Sanctuary. Seub committed suicide to signify the importance of the environment and to preserve it. According to the Bangkok Post, "The death of Seub Nakhasathien, a forest conservator who committed suicide in 1990,...helped transform the status of Thungyai Naresuan and the adjacent Huay Kha Kaeng Western Forest Complex into a sacrosanct site and inspired many youth to become forest patrol staff."

Ng Cho-nam, SBS, JP, was a Hong Kong environmental studies scholar and conservationist who taught as an associate professor within the Department of Geography at the University of Hong Kong. He served as a top advisor on numerous Hong Kong government committees in areas of conservation, sustainable development, environmental protection, urban planning, and was an active member in various environmental NGOs. He was the director of the Conservancy Association from 2000 to 2019.

Maksymilian Siła-Nowicki was a Polish zoology professor and pioneer conservationist in Austrian Poland, and father of the poet Franciszek Nowicki. He was brother-in-law to Kraków University law professor and rector Franciszek Kasparek.

Pete Oxford is a British-born conservation photographer based in Quito, Ecuador. Originally trained as a marine biologist, he and his wife, South African-born Reneé Bish, now work as a professional photographic team focusing primarily on wildlife and indigenous cultures.

Clifford Allan Redin Savory is a Zimbabwean ecologist, livestock farmer, and president and co-founder of the Savory Institute. He originated Holistic management (agriculture), a systems thinking approach to managing resources.

France Staub was a Mauritian ornithologist, herpetologist, botanist, and conservationist.

Captain Don Stewart,, was best known as Captain Don, The Father of Bonaire. In the early 1950s, he invented and patented an "adapter for screen cloth" which is basically the frame for a screen door. He was also a story teller, an advanced scuba diver, an environmental activist and protector of the coral reefs that fringe the coastline of Bonaire, a small island in the Caribbean Netherlands where Stewart lived most of his life.

Abdolrasool Vatandoust Haghighi was born in Isfahan, Iran, on July 17, 1947.

Wietse van der Werf is a Dutch social entrepreneur, conservationist and author, most recognised for his work combining ocean conservation and social entrepreneurship. He is the founder of the Sea Ranger Service and was named European Young Leader in 2020.

David Balcombe Wingate OBE, born October 11, 1935, is an ornithologist, naturalist and conservationist. He was born in Bermuda.