It is not known when and how the Kwugra became extinct. It has been deciphered from ancient Kwugran texts that they attempted to do something "fun", which involved making an elaborate system of screw-pumps and floodgates to bring magma from underneath the mountain up to their forges in the upper mountain. It would appear that this project either failed or never came to fruition as their mountain halls now echo empty with neither Kwugra, nor magma in them. There are journals who are believed to be dated from after this project was to be undertaken, but since the Kwugra way of counting time hasn't been fully understood, it could be dated to before the date of the grand project. In this journal the whole project is dismissed with great disdain by the author, calling it a "stupid Kwugra trick".
Kwugra were exceptionally short, standing less than 3'6'' (~1 meter) but being unusually stout and wide. From engravings in the abandoned mountainhomes it can be determined that most, if not all, Kwugra wore great beards that were often adorned with rings and bands of what appears to be precious metals. Some also had braided beards and hair.
Ecology and Habitats
The only ventilated places found are their forges, understandably as the temperatures needed to forge any metal would require fires that were continually stoked, producing a lot of smoke.
As far as what has been gleaned from deciphered Kwugran journals and notes, they had an intricate social structure with very demanding and posh nobles at the top, often coming with ridiculous requests for production, and a middle strata of master craftsmen, where unusually the brewer was considered incredibly respected. At the bottom were a strata of loiterers and commoners whose only job was to carry stuff around the mountainhomes.
3'6'' (~1 meter)
Unknown (estimated 60-80 lbs / ~40 kg)