Kangaroo. I live in a country where it is quite acceptable to eat and wear the national coat of arms. (Kangaroo meat is very much like venison)
My favourite leathers are made from heavy grain Kanga, but not allowed for lsr because of perforations.
CSIRO reckons:
"Kangaroo leather is lighter and stronger than the hide of a cow or goat. It has 10 times the tensile strength of cowhide and is 50% stronger than goatskin".
Moose may be tougher, but the kangas box.