PORTLAND, Maine — Experts are now in preventative mode as the emerald ash borer, or EAB, expands its damage across Maine.

Moss and lichen may grow on solid, undisturbed surfaces, such as trees on your property. And though they aren't necessarily bad, you can remove them.

Historians discover one of North America's oldest living apple trees in Maine. June 03, 2025. ... The brownish gray bark is patterned with splotches of green moss and blue lichen.