The Swarm reference article from the English Wikipedia on 24-Apr-2004
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Swarm

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The term swarm (schooling or swarming) is applied to fish, birds and insects and describes a behavior of an aggregation (school) of animals of similar size and body orientation, generally cruising in the same direction.

A swarm of honeybees is a more specific term, referring to the reproductive action of an entire colony of bees (as opposed to the reproduction of single bees); see Queen bee and Honeybee life cycle.

See also SwarmWiki