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Plus, do you know what a leaf sheep looks like? And access videos and resources for your mental health, and our new Green Club Guide for young learners.
With the changing season comes a new look on our website. Explore our new design ([link removed]), featuring beautiful nature photography and colors that celebrate our favorite wild landscapes. We hope you enjoy!
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WWF E-news
October 2025
10 years of conservation in Sumatra's Thirty Hills ([link removed])
Located in the heart of central Sumatra, the forests of Thirty Hills harbor some of the world's most critically endangered species. We're sharing 10 successes from the past decade of forest protection, while working closely with local and Indigenous communities.
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Pledge to cut down on food waste ([link removed])
Food waste affects our planet, accounting for about 10% of global greenhouse gas emissions. You can help by signing the pledge to do your part and reduce food waste in your home. Get started today.
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Stingless bees help this Indigenous community in the Amazon ([link removed])
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How to start a Green Club at your school or within your community ([link removed])
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Explore our new mental health resources with meditation videos, articles, and more ([link removed])
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Podcast
Nature Prescriptions: How time outdoors can improve your health ([link removed])
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Travel
Photo expeditions: How to photograph a gorilla ([link removed])
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Do you know? ([link removed])
Do you know what this climate-friendly food is? Hint: It can last for years in your cupboard and is packed with nutrients.
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Species spotlight
Costasiella sea slug ([link removed])
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Size
The Costasiella sea slug can be up to 0.3 inches long.
Interesting info
One of the few animals able to photosynthesize, this sea slug eats a particular type of seaweed and stores the chloroplasts in its own body. This enables it to transform sunlight into energy—a process that gives the mollusk its green color.
Costasiella sea slugs are usually found close to coral reefs, where they contribute to the local ecosystem by keeping algae populations in check. They often graze together, like a herd of minuscule sheep. In fact, they are also known as leaf sheep. The leaflike structures covering their bodies provide more surface area for photosynthesis.
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Send a Halloween ecard ([link removed])
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Support WWF's global conservation efforts by symbolically adopting a leaf sheep ([link removed])
Pop quiz
After gray wolves were reintroduced to Yellowstone National Park in 1995, which of these species declined?
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Pronghorn antelope ([link removed])
WWF en Español
En WWF ofrecemos una gran cantidad de contenido en español como parte de nuestros esfuerzos por llegar a la comunidad Latina e Hispana de Estados Unidos. Visita nuestro sitio web ([link removed]) o síguenos en Facebook ([link removed]), X ([link removed]), Instagram ([link removed]), y YouTube ([link removed]) para más información.
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Apoyando infraestructura respetuosa con la vida silvestre para ayudar a los elefantes asiáticos ([link removed])
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En la Amazonía, una comunidad indígena invierte en ecoturismo ([link removed])
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¿Qué es el agua subterránea y por qué es tan importante? ([link removed])
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Conservacionistas se inspiran en los castores para salvar el río Grande ([link removed])
Photos: Orangutan in Sumatra © Neil Ever Osborne/WWF-US; Cutting vegetables © Elizabeth Dalziel/WWF-UK; Indigenous beekeeper © Tatiana Cardeal/WWF-US; Green club guide © WWF-US; Clownfish © James Morgan/WWF-US; Nature Breaking image © Adriano Gambarini/WWF-US; Gorillas and travelers © Richard de Gouveia; Mystery food © Shutterstock.com/Aerdphoto; Costasiella sea slug © Shutterstock.com/KaenS; Howler monkey © Shutterstock.com/M Antonello Photography; Gray wolf in Yellowstone National Park © Eric Sackler; Asian elephant © Christy Williams/WWF; People in kayak © WWF/Tatiana Cardeal; Group of people © Green Renaissance/WWF-US; Beavers © Bruce D. Taubert
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