Invasive Phragmites (frag-mī-tēz)
See Video below
Phragmites (Phragmites australis), also known as the common reed, is an aggressive wetland invader that grows along the shorelines of water bodies or in water several feet deep. Once introduced Phragmites invades a site it quickly can take over a marsh community, crowding out native plants, changing marsh hydrology, altering wildlife habitat, and increasing fire potential.
This video will help you distinguish between native and non-native or invasive Phragmites.