While looking around for yesterday's Willingham pics I found a black & white example of Roslof's wicked awesome kobolds.
These guys are the more-than-half-starved remains of a kobold tribe pushed out of their territory by the Slavers. They subsist on raw fish as they've lost both the ability to make fire and access to their traditional hunting grounds. All kobolds are puny by design, but compare this duo to the healthy specimen from the Monster cards. I think those blotches suggest some sort of untreated disease, or perhaps they've lost scales in those places due to malnourishment.
4E Kobolds Converted to 5E
1 hour ago