This video is about army ants in Costa Rica. It is called Army Ants swarm a Whip Scorpion (Curú National Wildlife Refuge, Costa Rica).
This video is about army ants vs. leafcutter ants.
When army ants move out, a new study found that, instead of chasing each other away, birds work together to follow the column and hunt the insects that marching ants scare out of hiding: here.
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