VIDEOS:
"Sounds like a bird..."
We never see the ants that Marlow warns about or figure out what they're capable of. All we know is that they're big enough to make bird-like sounds and, judging by the island's other fauna, what they're capable of is not pretty. It's all left up to the imagination.
Example of:
Nothing Is Scarier
Example of:
Primate Versus ReptileExample of:
Gentle GiantExample of:
Death Glare