Nocturnal is an interesting evolution.

There's alternative timeline about what would happen if instead of Zerocross, I was a regular Terran that became infested. Then in that timeline I would join Stukov as his right hand and well... I would experiment with regular Zergs and make them a secret weapons to support Stukov directly. And do so, I used sample of nocturnal animals genomes. Animals such as bats, ocelots, spiders, scorpions... Not also forgetting that one way or another, Stukov ends adopting Nastasia/Nautilia the Trident Of Marrow as his daughter, leading to some alliance with Aquatic Zergs Brood. What about the infested me? Lets imagine that once you killed a mutated human or rather you thought so, the individual suddenly changed into a gigantic spider. Also Niadra makes her powerful return as a Zerg Broodmother to beware of in my stories. So, one way or another we get Dark Zergs Broods. Even scarier than originals. Making past's Zagara a walking teddy bear.

though since I remember their are more idea's witch would give them the ability to only see thermal.

in example a subterranean life form called a Graboid would have that trait when it go's into the second stage called a shreeker cause a shreeker can use it's breath to attracted other shreekers to alert them of food they would chase and eat.

Ok. But actually, its just shadow camouflage in this case.

even shadows have evolutions.

True.