Isopod IDs??

[Uther]

I caught these isopods in Iowa/Illinois and I'm curious what IDs they are, some look different. And also is it necessary to separate the different species? Thanks!

 

[Ultum4Spiderz]

I caught these isopods in Iowa/Illinois and I'm curious what IDs they are, some look different. And also is it necessary to separate the different species? Thanks! View attachment 481894

Pill bugs vary in coloration . Mine are mostly gone,..

 

[Hisserdude]

Looks like a mix of A.vulgare and A.nasatum.