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In pictures: Desert Locusts
Complex cycle

The Desert Locust - Schistocerca gregaria - changes both colour and behaviour as it develops from the egg.

1. The female locust lays her egg directly into the soil.

2. After two weeks a green coloured juvenile, called a solitary locust, emerges.

3. As the solitary locusts interact with others they turn yellow and black.

4. These locusts, called gregarious locusts, form into swarms.

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