Bog A bog, or bogland, is a type of wetland where peat forms from dead plant material, primarily sphagnum moss. Bogs are one of the four main wetland types and are also known as mire, quagmire, or muskeg; alkaline versions are called fens. Related Articles: Short-Eared Owl Species Guide: Appearance, Diet, Habitat, Behavior, Stats, And Conservation StatusGlossary: HeatherIdentifying UK Corvids: A Comprehensive GuideGlossary: Tundra Swan (Cygnus columbianus)Raven (Corvus corax) Species Guide: Appearance, Diet, Habitat, Behavior, Stats, And Conservation StatusGlossary: Meadow Pipit (Anthus pratensis)Glossary: Pool Frog (Pelophylax lessonae)