Amstron

The Amstrons were a species of intelligent mice.

The Eleventh Doctor had to save Rokhandi from the Amstrons twice in order to obtain a landing permit to the planet. (COMIC: The Friendly Place)

They and the J'arrodic had been engaged in a long war, known as the Eternal Dogfight, over what was really on the other side of the Gate of Creation. Alice Obiefune discovered it was captivating beauty that enthralled most observers. Due to her grief over the death of her mother, she was immune to the effect and returned to tell the combatants the truth, which ended the war. (COMIC: The Eternal Dogfight, The Infinite Astronaut)