Some may see them as just a part of nature, or even as something beautiful. But many birds, plants and insects are invasive ...

Species introductions, whether intentional or accidental, almost always result in negative consequences. Non-native plants and animals introduced to a new area tend to die out or take over, rarely do ...

Invasive species have transformed ecosystems across the United States in ways that are still unfolding. Introduced intentionally or by accident, these animals spread rapidly with few natural controls.

The invasive Asian swamp eel is threatening the Florida Everglades by disrupting the food web. This predatory fish has caused an 80% loss of the prey base for wading birds in some areas. Likely ...