Collective Locust Swarm Behaviour and the Environment. When environmental conditions are favorable locusts breed rapidly greatly increasing their population numbers They first form bands as nymphs and then after 5 molts as adults they can form Swarms
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When environmental conditions are favorable locusts breed rapidly greatly increasing their population numbers
>40mm rainfall needed for oviposition
Another >40mm rainfall needed for survival
Highest concentration of locusts at the front
Exponential decay of density as one moves towards the back
Front forms a thin crescent shape where densities can reach several thousand individuals per square metre and the rest of the group behind this are scattered.
A) Abdominal denervation
Within groups, abdominal biting and sight of others approaching from behind triggers movement