What animals mare ost active after sundown with light coloration and long limbs ears?

You're describing a creature with characteristics commonly associated with jackrabbits!

Here's why:

* Active after Sundown: Jackrabbits are crepuscular, meaning they are most active at dawn and dusk.

* Light Coloration: Their fur can vary in color but is often light brown or white, providing camouflage against the desert landscape.

* Long Limbs and Ears: Jackrabbits are known for their extremely long legs and ears, which help them escape predators and regulate their body temperature.

Let me know if you'd like to learn more about jackrabbits!