ORLANDO, Fla., Jan. 9 (UPI) -- Florida waterways, already infested with invasive snakes and fish, are now under siege by a plant foe, the Carolina willow, researchers say.
The willow plants are starting to strangle portions of the St. Johns River, they said, forming impenetrable thickets that prevent boating and eliminating duck habitat. They also use tremendous amounts of water, leaving less available for wildlife and people.