Guys, Sil is using better logic for this.
Also Dark horse's ideal at least is not Cliche, such as the fanboy idea of just making poorly thought up smaller Preds with boobs.
Making the females too much like our own females, we humanize them too much.
Predator males would not chose females based off of the same qualities we do.
Logically a Pred male would want the biggest strongest female, the most cunning, the most aggressive, the best skilled etc... Because she would produce him the strongest offspring.
Smaller and more delicate females, such as what human males find attractive more on average, is a stark contrast to the values of a predator.
I would think females (assuming the ones we have already seen are male and not hermaphrodites), would be every bit as big as the males, maybe even bigger and stronger as that is actually very common even on this world too.
Other than their general humanoid silhouette Preds are still alien.
Do the males (if the ones we've seen even are males) even have nipples?
If not, then I would assume females have no breasts either.
Edit: The males do NOT have nipples. I just took a look at my "creature effects of ADI" book, and it heas some very detailed pictures of the naked pred costume, all details there, with and without piant ect...
NO Nips.
Therefor, I would not expect females to have breasts either.
I would say it is very safe to say, Predators are NOT mammals.