From Wikipedia:The Iroquois Confederacy (also known as the "League of Peace and Power", the "Five Nations"; the "Six Nations"; or the "People of the Longhouse") is a group of First Nations/Native Americans that originally consisted of five nations: the Mohawk, the Oneida, the Onondaga, the Cayuga, and the Seneca. A sixth tribe, the Tuscarora, joined after the original five nations were formed.
It was common for groups of Indians to copy, trade and develop bows with their allies. Therefore, a Mohawk bow might look like a bow used by any of the above nations.
Bows of these tribes varied from straight D-bows to recurves. Hickory was used most often. It appears that the Mohawks might have used longer bows than the other tribes (on average)? All these bows bent through the handle, were self bows, sometimes decrowned, rectangular or oval in cross section, wide tipped, and had side-cut nocks. I don't remember seeing any double curved or reflexed bows among these tribes. The only two Mohawk bows I've seen are recurved.
I wish there was a really good source for info on Mohawk bows (and other weapons). I think Jim Hamm's book on Bows, Arrows, and Quivers, Vol. I is the best single source.
Here's a Mohawk bow.
Length = 113cm (44-1/2")
Width = 3.5cm (1-3/8")
Handle Thickness = 2.5cm (1")
Probably made from a hickory sapling.
It was origianlly decorated with quillwork.