Biodiversity

On a calm, quiet morning, you’ll hear it. The call of the southern yellow-cheeked crested gibbon. It’s an enchanting sound that echoes across the forest — often heard as a duet with its mate. Unlike most primates, this gibbon adds an undulating, almost whale-like sound to the melody of the forest. And this call is what lures visitors out to Cambodia’s Keo Seima Wildlife Sanctuary at sunrise, just for the privilege of hearing it.

Protecting Cambodia’s forests is crucial in ensuring the future of its wildlife.

Salmon are inseparable from the culture of Native American tribes of the Pacific Northwest. But they're up against critical challenges impacting both tribal lands and the climate as a whole. Find out how trees play a role in lessening some of these obstacles to their survival.

See how trees can help lessen some barriers to the survival of salmon.

How can trees help critically endangered southern resident orcas? In more ways than one. Find out how trees protect and support the delicate ecological web these mammals depend on for their survival.

Explore how trees are at the core of endangered orcas' fight for survival.

The Northern spotted owl can tell us a lot about the health of old-growth forests. But these birds are facing more challenges today than ever before. Find out how protecting delicate ecosystems is paramount for this creature’s survival.

Find out what the Northern spotted owl can tell researchers.

The forests of southern Oregon are prime real estate for the bald eagle. And while their numbers have rebounded in the last 50 years, their future survival depends on preserving and reestablishing the ecosystems they call home. Find out how trees help them thrive in a multitude of ways.

Find out how the bald eagle's survival is inseparable from the health of forests.

The endangered ocelot makes its home in a range of environments, from the dense rain forests of Central and South America to arid thornscrub forests of Mexico and Texas. See how these animals urgently need trees to ensure their survival in the face of rampant deforestation.

Find out how these big cats' survival is tied to deforestation.

As a backbone of our ecosystems, the story of trees is inseparable from the story of biodiversity on this planet. With unprecedented biodiversity loss, it’s not enough just to plant trees — learn how we use science to plant them where they’ll have the biggest impact.

Learn how science helps us safeguard biodiversity through trees.

Trees are part of the solutions to major challenges that span borders. That’s why our global network of planting partners are crucial. Find out how we work with local leaders to plant trees where they'll have the greatest impact for the planet.

See how local leaders are on the front lines of planting around the world.

The world needs trees now more than ever. Find out how the Arbor Day Foundation is taking action with the goal of planting 500 million trees with a focus on areas of greatest need by 2027.

Find out how we're planting 500 million trees with focus and intention.

Madagascar is home to one of the most remarkable ecosystems on the planet. Learn about our work with local residents who are growing and planting trees to combat deforestation.

See our work in action with those safeguarding Madagascar's future.

Each year, millions of monarch butterflies travel thousands of miles to oyamel forests in Mexico. However, these critical ecosystems are on the decline. With the monarch butterfly now listed as an endangered species, learn why restoring their winter home in these forests is critical to their survival.

Explore reforestation work critical to the monarch butterfly's survival.