| 1. | When that ritual is complete, the mayflies are called spinners.
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| 2. | Mayflies are an ancient group of winged ( pterygote ) insects.
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| 3. | The Bayou darter eats insects and their larvae, including mayflies.
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| 4. | It is a basal group of mayflies with a worldwide distribution.
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| 5. | All the mayflies are gone within about thirty minutes of emergence.
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| 6. | During a hatch, mayflies shed their nymphal shucks and become duns.
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| 7. | For the mayfly, however, life truly is short.
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| 8. | Sulfurs, tiny yellow mayflies, began emerging in the failing light.
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| 9. | The mayfly has come to symbolise the transitoriness and brevity of life.
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| 10. | The dead mayflies fall onto the fans below, obscuring their view.
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