North American possums are generally 38-51 cm long and weigh 4-6 kg. Then let's take a look at the morphological characteristics of North American possums. The North American possum has a dark gray-brown fur and white facial hair. North American possums have long, hairless tails that allow them to grasp branches and small objects. Their ears are hairless and their noses are long and flat. The North American possum has 50 teeth, and the big toe of the hind limbs has no claws and can be opposite to the other four toes. North American possums have 13 nipples, 12 of which are in a circle and 1 in the middle.

The footprints of possums can be seen with 5 toes. The footprints of the hind limbs are very special due to the relationship of the big toe, which is generally 90° or even 180° with the remaining four toes. The forelimb footprint of an adult North American possum can reach 4.8 x 5.1 cm, while the hindlimb is 6.4 x 5.7 cm.