A feller buncher is a type of harvester

Harvester (forestry)

A harvester is a type of heavy forestry vehicle employed in cut-to-length logging operations for felling, delimbing and bucking trees. A forest harvester is typically employed together with a forwarder that hauls the logs to a roadside landing.- History :...

 used in logging

Logging

Logging is the cutting, skidding, on-site processing, and loading of trees or logs onto trucks.In forestry, the term logging is sometimes used in a narrow sense concerning the logistics of moving wood from the stump to somewhere outside the forest, usually a sawmill or a lumber yard...

. It is a motorized vehicle with an attachment that can rapidly cut and gather several trees before felling them.

A feller buncher consists of a standard heavy equipment base with a tree-grabbing device furnished with a chain-saw, circular saw

Circular saw

The circular saw is a machine using a toothed metal cutting disc or blade. The term is also loosely used for the blade itself. The blade is a tool for cutting wood or other materials and may be hand-held or table-mounted. It can also be used to make narrow slots...

 or a shear

Shears

Shears may mean:* trauma shears, scissors used by emergency medical personnel to quickly and safely cut clothing* kitchen shears, a kind of scissors* pinking shears, a kind of scissors* blade shears, typically used for shearing animals...

 - a pinching device designed to cut small trees off at the base. The machine then places the cut tree on a stack suitable for a skidder

Skidder

A skidder is any type of heavy vehicle used in a logging operation for pulling cut trees out of a forest in a process called "skidding", in which the logs are transported from the cutting site to a landing. Here they are loaded onto trucks , and sent to the mill...

 or forwarder

Forwarder

A forwarder is a forestry vehicle that carries felled logs from the stump to a roadside landing. Unlike a skidder, a forwarder carries logs clear of the ground, which can reduce soil impacts but tends to limit the size of the logs it can move...

, or other means of transport (yarding) for further processing (e.g., delimbing

Delimbing

*An extension or projecting part of a tree.When the tree is lying on the ground, branches may be storing enormous potential energy through mechanical strain. When a branch is cut, often with a chain saw, this energy can be released suddenly and the branch can jump dangerously. In addition, a branch...

, bucking, loading, or chipping).

There are also wheeled feller bunchers with no articulated arm.