Northern flying squirrels, Glaucomys sabrinus are larger and have belly hair that is dark at the base and white at the tip.

[2] Just before reaching a tree, they raise their flattened tails to abruptly change their trajectory upwards and point all of their limbs forward in order to create a parachute effect with the membrane.

[1] Upon landing, the limbs break the remainder of the impact and the squirrels usually run to the other side of the trunk in order to avoid any potential predators.

[3][2] Under ultraviolet light, females and males of all 3 species of Glaucomys fluoresce in varying intensities of pink on both dorsal and ventral surfaces.

Moreover, these authors argue that it is far from evident that UV illuminating sources that occur naturally are sufficient to elicit luminescence distinguishable from ambient visible light.