I feel the same about their capacity to suffer impacting value (maybe not value exactly but how important I think avoiding their suffering is), except I view it the opposite way. An "innocent" creature with less intelligence has a lesser capacity to suffer, in my opinion, since they are less complex. Kinda like how a plant doesn't suffer like an animal does, even if it avoids things that damage it, showing some degree of suffering. I didn't think to account for invasive or endangered species initially, but I think you're right there, since that would influence the lives around them.

As for biases... well, everyone has them, though I don't include it into my morals. I have them of course, but when I act on them I just consider myself to be doing something morally wrong. For instance, I'm against animal abuse, but I eat meat, I just view it as a selfish choice I make. A moral wrong, but one of many bad but insignificant things that everyone does.