A USDA report cites a Lambrinos, 2006 study which found foraging animals like sheep and goats rarely chewed on pampas grasses. Pampas grass' insidiousness isn't limited to the loss of biodiversity.

This very confusion was evident on Reddit this week when a user posted an innocent-looking photo of his parents' front garden, asking: "Were your parents, like mine, proud of their pampas grass?" ...