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The Nature Conservancy in Delaware

Several horseshoe crabs pile on top of one another in shallow water.
Pileup Native horseshoe crabs along the bay at Slaughter Beach, Delaware. © Deb Felmey

Preserving Nature in Delaware

Since 1990, TNC has worked with government agencies, private corporations, conservation organizations and our members in Delaware to protect the places on which people and wildlife depend.

Stories in Delaware

An aerial view of a march winding through green marsh grass.

Delaware Conservation Blueprint

Delaware’s natural lands are under increasing pressure from development and rising sea levels. Explore our plan to address these challenges.

A green, brown, and white spotted butterfly sits on a cluster of small white flowers.

10 Amazing Rare Species Found in Delaware

Thanks to TNC's land protection projects and ongoing conservation efforts, Delaware has witnessed the return of several rare and endangered species. Discover 10 rare species spotted in Delaware.

Six horseshoe crabs sit on top of a pile of green seaweed that has washed up onto a sandy Delaware Bay beach.

Horseshoe Crabs in the Delaware Bay

Learn how the iconic Horseshoe Crab plays an essential role in the health of our coastal ecosystems in Delaware, and beyond.

Close up view of a pile of garbage. Discarded cans, glass bottles and plastic milk jugs and soda bottles are scattered across a thick pile of sticks, logs and broken wood.

Eight Ways to Reduce Waste

Eight Ways You Can Reduce Waste In Your Life and Home.

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More from Delaware

Learn more about our team and TNC's work across Delaware

Our Staff: Experts in Action

Meet some of the people who are working to create lasting solutions in Delaware and around the world.

Contact Us

Contact our team of 50+ staff members dedicated to making a difference in Delaware.

Volunteer With Us

There is more than one way to volunteer for TNC in Delaware. Find upcoming events and ongoing volunteer opportunities.

Latest Newsletter

Download our latest newsletter featured in the Winter 2025 Nature Conservancy magazine.

Keep Learning

Explore our publications and watch highlights from our presentations and webinars.

Research/Special Requests on TNC Preserves

Click here to apply for permission to conduct research or another special activity on a TNC Preserve.

Several Horseshoe crabs pile on top of one another in shallow water.

Conservation Update

2024, A Year of Conservation Results.

2024 was an important year for conservation. Explore some of our conservation wins and projects in Delaware.

Explore Our 2024 Results
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Upcoming Events

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An aerial photo of a a forest with a dirt path in the center.

Places We Protect

Places We Protect

From forests to the coastline, explore our nature preserves across the state of Delaware.

Find a Preserve Near You
The sunsets over the Delaware Bay.