The Last Watch of Summer
Diminutive is the word that best describes Kobolds. These reptilian humanoids are small in stature, brain power and spirit. They have been observed in many different colours that seem to bear no correlation with their environment but metaphorically speaking they are all yellow.
They are neither commonplace nor rare at the wilder edges of more advanced races. Border towns with a group nearby find them a pest for stealing trinkets for their peculiar tribal hordes and small livestock on occasion. As nearly three quarters of a given horde is as likely as not discarded junk with no value, it is quite plausible an outer township could have a network of their tiny runs underfoot and never notice the loss of the things Kobolds pick up.