Ryzackians explained:

The Ryzackians are not werewolves: rather bipedal, hairless, humanoid fruit bats crossed with lemurs (aye aye hands) six fingers: four main and two thumbs. Six toes: four in front and two in back. Occasionally modified with artificial quills on wrists and shoulders. They do not howl in the sense that we typically see canines doing.

I imagined these creatures, in the realm of film, to be portrayed as silent. As you are reading the novels, you are literally reading data driven interpretations of their speech (log entries) from "machines" in their heads. These machines also directly give them their eye colors, and if damaged, can influence behavior directly. Translating that to a third person film would mean you are viewing them as silent creatures with occasional alien/like barks. So a silent film would be the best lore-bound solution to how they would realistically look. 

This is not a space-bearing, galaxy conquering science fiction story, but an isolationist story of a species on its last leg. They are fighting territorial skirmishes in a withered metal wasteland. I will not elaborate more on this as of now.