Learn how to tie a brush bundle. Sunken logs, trees, branches, and root balls provide excellent habitat for wildlife, including fish, turtles, birds, and invertebrates. Human activity and development have significantly reduced the amount of natural woody debris in lakes. Communities can promote the health of wildlife populations and improve water quality by creating additional woody debris habitat, such as in-water structure of brush piles or bundles. These brush bundles can provide fish with a food source, areas to rest, spawn, and escape predators.