Some star trek headcanons (developed over a fun night of talking and thinking)
- There are bound to be some species who can see humans Blaschko’s lines (they’re visible in black light, so some real animals can probably see them better than we can; we can only see them when we shine black lights on ourselves or when we have certain skin conditions). There’s also probably some who have fun patterns like that themselves (I find myself reminded of the Trills)
- Cardassians have a similar “hood” in their necks to cobras, except instead of being flared from an “!I’m in danger!” Response (as in irl cobras), it’s more like an involuntary version of a peacock fanning his tail feathers (except both sexes can do it).
- And there’s got to be a few other species who can hear deer/dog whistles and such (obviously the Ferengi can but like. There’s gotta be others). Conversely, with Cardassian hearing being less fine than human hearing, there’s likely a fair few things we can easily hear that they wouldn’t (high sounds similar to the whine of tube tvs, really low rumbling, and very hushed, faint sounds of any tone come to mind.) Some Cardassians with poor hearing by their own standards who work with humans might need adaptive devices to help them (kinda like the hearing version of the lady from a low-gravity place who needed a wheelchair, since her home environment was so dissimilar from this new environment).