05/01/2026
A branch fell off your oak last fall. You've been meaning to haul it to the curb. It's been on the ground for six months.
In that time, it became an apartment building.
Year one: Fungi colonize the exposed wood. You can see the first brackets forming on the bark — small, shelf-like growths that are breaking down the lignin and cellulose inside. The branch is getting softer.
By year two or three: Beetle larvae have tunneled into the softened wood. Their galleries — winding channels the width of a pencil lead — aerate the interior. Woodpeckers find the branch and drill into it to extract the larvae.
By year five: A red-backed salamander has moved into one of the beetle galleries. She lives in the damp, rotting wood and hunts pill bugs, mites, and springtails on the surface. The branch is now a hunting ground and a shelter.
By year ten: The branch is mostly soil. The fungi, the beetles, the salamander, the woodpecker — they converted a fallen limb into nutrients that are feeding the tree it fell from.
🌿 A different way to see the branch:
- A fallen branch is not debris — it's a building under construction
- If it's not blocking a path, leave it where it fell
- The fungi that colonize it aren't disease — they're decomposers doing their job
- One fallen branch can support more than thirty species over its lifetime
You almost hauled it to the curb. Thirty species are using it now. 🌿
