"Invasive species"—they may not sound very threatening, but these invaders, large and small, have devastating effects on wildlife.

The following are a list of resources to assist in accurate identification of some species (Insects, Marine, and Fish) considered to be invasive in Maine.

The European Green Crab is one of the most successful coastal marine invasive predators in the world. It has established populations in 5 continents.

The emerald ash borer (EAB), Agrilus planipennis, is one of the most serious invasive species threatening our ash resources and forests. All species of (Fraxinus) ash trees, but not (Sorbus) mountain ash, that grow in Maine are susceptible to injury and death by the emerald ash borer.

Since the early 1980s, waterways across central and southern Maine have been significantly altered by the presence of the invasive northern pike.

Spongy moth (Lymantria dispar dispar) is a destructive, invasive insect that poses a danger to North America's forests.