Erigone atra is a species which dispersed aeronautically in large number in autumn and summer. It is found on small grasses near the ground and dispresed for their survival. There legs detects the air currents and if the air currents are favorable then is uplifted because it remain streched there leg and abdomen pointing in air. When aircurrent are favorable is uplifted and dispresed to new location. Hence by dispresal they overcome the environmental condition.
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