[1] Despite its many apomorphic features, the details of its morphology suggest a close relationship to the diverse genus Metopochetus, which is also in the tribe Metopochetini.

The fossil stilt-legged fly Electrobata tertiaria from Baltic amber of the Paleogene also shows some similarities; it may be a very basal member of the Metopochetini, close to the divergence between these and the Eurybatinae.

Its body is stockier, with a petiolate abdomen (like in ants and other Apocrita), its middle and hind legs are less elongated, and its forelegs are less shortened than in its relatives.

In the male the postabdomen is highly characteristic, the sternite of the 5th postabdominal segment is shallow divided into 2 lobes, each of which bears two or three stout bristles at the tip; the entire structure is very similar to that of Electrobata tertiaria.

On the other hand, the ejaculatory sclerite of Badisis is unlike that of any known Metopochetus, with a rod-like apodeme expanded at the tip like a mushroom-head.

As far as is known, B. ambulans inhabits sclerophyll forest, where the males are occasionally encountered on flowers of the Myrtaceae shrub Astartea fascicularis.

The Albany pitcher plant prefers somewhat moister habitat than the fairly arid locations where adult B. ambulans have been collected.

Thus, the adult flies may be more mobile than their winglessness suggests, able to walk for prolonged distances, and consequently more resilient to local extinctions of the Albany pitcher plant.