The following tables contain links to fatality investigation reports of incidents where logging incidents resulted in the deaths of workers. The first table contains a list of cases investigated by NIOSH; the second table contains a list of cases investigated by state investigators in state FACE programs.

http://www.cdc.gov/niosh/injury/traumalgface.html

83-05 Falling Tree Limb Strikes Logger
92-09 Tree Faller Killed when Struck by Decayed Slab Jarred Loose by Fallen Tree—Alaska
92-10 Tree Faller/Bucker Crushed Between Two Logs While Bucking a Fallen Tree—Alaska
92-15 Tree Faller Crushed by Dislodged Tree—Alaska
92-21 Tree Faller Dies After Being Struck by a Falling Snag—Pennsylvania
92-38 Tree Feller Crushed by Falling Tree—Virginia
93-01 Tree Feller Crushed by Dislodged Tree—South Carolina
93-02 Tree Feller Dies After Being Struck by a Chain Saw in the Throat—South Carolina
93-03 Truck Driver Killed when Struck by Log that Rolled off Truck During Loading Operation—Alaska
93-04 Owner of Logging Company Crushed by Rootwad of Windfall Tree During Bucking Operation—Alaska
93-05 Tree Feller Killed by Falling Tree Limb—West Virginia
93-10 Timber Cutter Dies After Being Struck by a Falling Snag—West Virginia
93-13 Timber Cutter Dies After Being Struck by a Falling Snag—West Virginia
93-16 Equipment Operator Struck and Killed by Skidder—South Carolina
94-05 Timber Cutter/Skidder Operator Killed by Falling Tree—West Virginia
95-03 Timber Cutter Killed by Falling Tree Limb—West Virginia
95-04 Timber Cutter Killed by Falling Tree Limb—South Carolina
95-05 Chokersetter Killed by Falling Tree—South Carolina
95-07 Machine Operator Struck and Killed by Cutting Head of Feller Buncher Machine—North Carolina
95-08 Truck Driver Dies After Being Struck By Log That Fell From Logging Truck—North Carolina
96-10 Logger Dies After Falling From Log Skidder—South Carolina
96-13 Foreman/skidder Operator Killed by Falling Tree—West Virginia
96-14 Tree Feller Killed by a Piece of Wood From a Falling Tree—Pennsylvania
96-15 Tree Trimmer/Climber Dies After Falling 40 Feet With an Uprooted Tree Trunk--Virginia
97-05 Hog Farmer/Logging Company Owner Dies After Being Struck by a Falling Tree—West Virginia
98-09 Tree Feller Killed When Struck by Chain Saw—West Virginia
2004-04 Hispanic Logger Struck and Killed by a Falling Tree Cut by a Feller Buncher Machine—North Carolina
2004-07 Chain Saw Operator Dies After Being Struck by Excavator Bucket During Site Clearing—North Carolina

Seems to me the Ents could use a military adviser or two...