How do ants know to walk on the same track and there is no visible landmarks?
Question:
Answers:
They release a chemical trail to follow. It may not be visible to us, but the ants sure do smell it.
Pheromone trail
They leave a trail of chemicals they can smell to follow.
They leave pheromones that other ants can smell. Like when a dog marks his territory by giving the fire hydrant some yellow discipline.
Also, ants in the desert have no landmarks but the sand, and they need to be able to make it back fast so they don't fry. They can be seen leaving the ant hill and making a quarter turn, then continuing in a new direction, stopping every so often to make a funny turn. When they find some interesting prey, they go back to the ant whole in a straight line (not back on the jagged path they came from). It turns out that through their turning they can calculate the angle between their path and the sun and can spatially orient themselves and their ant hole. AWESOME!
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