Why don't insects - particularly flies, wasps and bees - fly in straight lines like most birds do? Their flight patterns seem chaotic and often circular in motion. Surely it is inefficient for them to fly in such a random way? Birds seldom fly in straight lines, in fact, and any self-respecting ornithologist can identify many species by flight pattern alone. That said, birds tend to fly fairly directly to a target in sight, and more complex journeys tend to follow efficient paths based on learned topography.
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