Great photos! 😊The tan birds are red sex links, these are known by many names, including “golden comet”. They are hybrids that are bred to be high egg producers. They usually start laying quite early and often. The first barred bird is a Dominique with the flat, or rose comb. The second barred...
The dark brown black one that you’re calling an Americana is likely an Easter Egger and unfortunately it may very well be a male. Post good clear photos of this one individually with a close-up of the comb & side view of the whole bird.
From what I can tell your red ones look like Red Sex Links (known by many other names) and your white ones look like White Rocks. Post good clear close-ups of the birds in question and we can give it a go! Welcome to BYC!😊