Mayfly Lifecycle and Ecosystem Impact

In the river's depths, mayfly larvae prepare to emerge. They burst forth as adult flies, with only 24 hours to mate and die. This event is so massive it appears on weather radar. Birds and frogs feast on the mayflies, but most survive to return to the river, completing their lifecycle.

What is the initial activity of the mayfly larvae at the river bottom?

• They are feeding on algae.

• They are preparing to emerge as adult flies.

• They are migrating upstream.

• They are building nests.

How long do adult mayflies have to complete their lifecycle?

• 72 hours

• 48 hours

• 12 hours

• 24 hours

What unusual phenomenon is caused by the dense emergence of mayflies?

• It leads to increased water levels.

• It appears on weather radar.

• It causes a drop in local temperature.

• It creates a loud buzzing noise.

Which animals are mentioned as benefiting from the mayfly emergence?

• Songbirds and leopard frogs

• Bats and owls

• Fish and turtles

• Deer and rabbits

What happens to the majority of mayflies after they reproduce?

• They become predators themselves.

• They die and contribute to the river ecosystem.

• They return to their larval stage.

• They migrate to another river.