When people ask whether a deer or a red deer is the "biggest" woodland creature, the answer depends entirely on how you measure size.
Weight Comparison
By weight, red deer generally come out on top. A mature male red deer can weigh up to 300 pounds, while many common deer species range from 50 to 200 pounds.
Height Comparison
Red deer also stand taller. Males can reach up to 5 feet at the shoulder, while typical deer usually stand around 3 to 4 feet tall.
Antler Comparison
Red deer boast larger antlers as well. The antlers of mature males often exceed 4 feet in length, surpassing those of most other deer species.
The Bottom Line
If you are judging by weight, height, or antler size, the red deer is the clear winner. In virtually every measurable category, red deer are larger than common deer.