As of early 2017, the mammoth now can carry wood at 12.5 weight per stack, which is now better than a beaver. Like so others may see

A mammoth can FLY. Quetzal + Mammoth can gather thousands of wood in minutes. Attack while a tribe/alliance mate flys you though an area with trees

New Patch brings a buff to our favourite furry friend. Now Mammoth have a 75% weight reduction of all wood in it's inventory.

Mammoth needs a platform saddle!

Very good for gathering wood, and can carry a lot