This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Gold-digging Ant (Medieval Bestiaries)
The gold-digging ant is a mythical insect described in classical and medieval bestiaries. They were dog- or fox-sized ants that dug up gold in sandy areas. Some versions of the Physiologus said they came from Ethiopia, while Herodotus claimed they were located in India. Herodotus reports that a species of fox-sized, furry "ants" lives in one of the far eastern, Indian provinces of the Persian Empire.
This region, he reports, is a sandy desert, and the sand there contains a wealth of fine gold dust. These giant ants, according to Herodotus, would often unearth the gold dust when digging their mounds and tunnels, and the people living in this province would then collect the precious dust. Pliny specifies that they are as large as an Ethiopian wolf, and the color of a cat.