Biodi-verse

“The more forest grew on and near a coffee farm, the more birds the farm had, and the lower its infestation rates [and] damage by a devastating coffee pest, the coffee berry borer beetle.” (http://www.nature.com/news/birds-protect-costa-rica-s-coffee-crop-1.13689)

The more trees grew, tiddly pom,
The more birds flew, tiddly pom,
The pests that chew, tiddly pom,
Got fewer.