To be honest, just go to Venus and look for them. They fly around and use a sniper to look at them closely. They're 2-D like the Falcons on the cosmodrome and in some areas there's more smoke then other places indicating that it's bit the weird blue fire,'but a lot of fire. Maybe their nest. But when you're near the "nest" you hear them roaring. Not a joke, look it up on YouTube. Also that place where you fight Crota when he's in the crystal, that big skeleton to your right when you walk in is believe to be a adult Ahamkara, while the ones on Venus look pretty small. It's weird