From 2speccers2tools wiki

The Pissaprobe has seen considerable success as a motile decomposer, partly because nothing much like it has evolved otherwise. With the ability to move from corpse to corpse as a single organism (unlike “Mushrooms” which can only do so via spore dispersal), this aberrant “canary” has staked an easy claim as Kamm’s most prolific saprotroph. With such success, it seems inevitable that the Pissaprobe would diversify further with the compounding of genetic differences among successive generations, and at some point, spread beyond the confines of Kamm. These derivatives, building upon the success of their ancestor, would come to be known as Flynguses.

A notable difference between a species of Flyngus and the Pissaprobe is that the former is considerably more motile, not only capable of moving between corpses by flight, but also along a single corpse. Like a slug, a Flyngus crawls across a corpse surface via papilla-like pseudopods from its cellular membrane. When the need to feed arises, it promptly embeds its branching hyphae into a suitable digesting spot, proceeding to secrete a cocktail of enzymes into the surrounding matter to break it down, and thusly absorb the resultant slurry. When not in use, the hyphae are retracted into a fold on the organism’s rear ventral side, with the branches compacting into each other not too unlike the proboscis of some nemertean worms; in contrast to the ancestral means of severing hyphae after a feeding, this method wastes comparatively less energy.

When it comes to locating suitable sources of sustenance, Flynguses come equipped with a number of sensory innovations. Surrounding what remains of the beak is a ring of chemoreceptive cirri - keen to any olfactory source indicative of a corpse. Working in tandem with these cirri are two pairs of photoreceptors capable of discerning differences between light and dark, and a fine coat of vibration-sensitive cirri which allow a Flyngus to stay alert towards predators and environmental disturbances. If for any reason danger is approaching a feeding Flyngus, it will hastily retract its hyphae and promptly take off via a pair of wide wings, able to remain consistently firm thanks to a skeletal network of bundled actin fibres.

Like with most other diverse genus groups on 2s2tworld, the key to Flyngus proliferation is their innovation in sexual reproduction. Somewhat paralleling the distantly-related canarflora of Dingus, Flynguses can exchange genetic material via contact between beaks, now that their role in feeding has diminished to disuse. Upon receiving a copy of the partner’s genetics, these will conjugate with the individual Flyngus’s own, and eventually develop and bud off into numerous genetically distinct offspring - measuring at just a millimeter in wingspan and already flight-capable. Both partners can acquire each others’ genes, and thus are similarly capable of producing new Flynguses. Such behaviors take place during conditions of abundance, such as the recent presence of a fecund corpse.

Flynguses have become an almost cosmopolitan presence. While hailing from Piss Plant stock which has been blown into Kamm from Dingus, some of the earlier splits from the Flyngus root flew back westward into these lands. The species found in lands further still can trace their origins to populations hitching rides on passing Pig-o-Dactyls, being carried from Kamm to Oofle, and from Oofle to Beans, Cube, and very recently as far as Ovifan on the opposite side of the planet, and each new environment has a distinct treasure trove of rotting biomatter for these “canaries” to gorge upon. It is important to note that no population of Flyngus has been able to viably establish itself on the Horrible Rectangle Island due to the lethal measures of radioactive emissions and severe competition from the organisms that have actually made footholds there.

Due to the Flynguses' position as a global keystone genus group helping to clean up decaying biomatter, they are sometimes referred to as Flies Which Must Logically Exist to Maintain a Biosphere.