The wood is being improved for the veteran trees and wildlife.
Worcestershire Wildlife Trust is having to fell trees at an ancient woodland for safety reasons.
The Piper's Hill and Dodderhill Commons nature reserve, known locally as Hanbury Woods, contains some of the oldest trees in the county.
James Hitchcock, conservation officer for the Trust, said: "This is essential maintenance work from a health and safety point of view."
Some trees will be felled to ground level, others will be reduced in size.
Long term plan
The Trust are working to restore the area back to wood pasture, an almost parkland-type landscape.
The long-term plan is to graze the nature reserve, ensure the survival of current veteran trees and enable young trees to grow and survive.
James Hitchcock says they only fell trees when there is no other choice:
"It's a shame to have to do this, especially as one, an ash, is of good size.
"We're doing it now so that we won't affect the breeding season for birds which will start soon."