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Harvester Ants
Colonies of harvester ants operate perfectly well in the absence of any apparent central control or organizing force. They travel up to 30 or 40 feet from their nests as they forage for their food. Maintenance ants police the nest entrance to reject items too large for the nest tunnels. Watch these fascinating insects as they busy themselves about their nest.

The Desert Food Chain
A food chain constitutes a complex network of organisms, from plants to animals, through which energy, derived from the sun, flows in the form of organic matter and dissipates in the form of waste heat.