What do bison, beaver, wolves and sea otters all have in common? They're keystone species. That means they have an outsized impact on their ecosystem. It took humans driving some of these to near ...

Some animals matter so much to their ecosystems that losing them is like removing the keystone from an arch—the entire structure begins to collapse. These keystone species shape food webs, carve out ...

Many gardeners know the key role milkweed (Asclepias) plays in bringing back declining numbers of monarch butterflies. But other species of Lepidoptera, other butterflies and moths need help, too.

University of Delaware entomologist Doug Tallamy's research has identified “keystone” plant species that make up the foundation of many U.S. ecosystems by producing food for native insects, thus ...

A critical species to the ecosystem is facing a variety of threats. This Earth Day, ABC News is taking a look at solutions for issues related to climate change and the environment with the series, ...

The insect threatens the health and survival of the black ash tree. In northern Wisconsin, April Stone is carrying on a centuries-old Ojibwe practice of basket making. She uses wood from the black ash ...

They have an outsized impact on their ecosystems. It took humans driving some of these to near extinction to realize just how important they are. SOS: Saving keystone species (Rebroadcast) What do ...

University of Delaware entomologist Doug Tallamy’s research has identified “keystone” plant species that make up the foundation of many U.S. ecosystems by producing food for native insects, thus ...