The "Handbook for Phase 1 Habitat Survey" describes woodland as an area where the vegetation is dominated by trees more than five metres high when mature forming a distinct, although sometimes open, canopy.
- Broad-leaf: a woodland where the canopy is formed almost exclusively by deciduous broad-leaf trees like ash and oak
- Acid: a woodland where the acid soil means that the tree mix is often oak, birch and possibly some Scots pine
- Wet; a woodland where the floor is almost continuously wet, often with standing water, where alder. poplar and willows dominate
- Mixed: a woodland where conifers have been planted amongst deciduous trees, often pines amongst beech
- Plantation: a woodland almost exclusively pine or spruce planted for a timber crop
- Amenity: A woodland planted for a specific purpose for the benefit of human beings; orchards, arboreta, shelter belts, parkland, etc