I refer to them as creatures in spite of their obvious intelligence. I refuse to acknowledge the tree-sized tungsten-based life forms as anything other than inferior to humans. If you insist, I admit they have shown some resiliency and even some unexpected ingenuity, particularly in the South American campaign. This is due to the differences in the way we process information and respond to stimuli, not some inherent advantage over us. Mark my words, we will prevail and drive these abominations from the Earth.