During the summer, fireflies begin their mating season. But with so many lights glittering in the dark, how can the male fireflies beat their rivals to gain a potential mate's attention? And how can they attract the one instead of a predator? Find out in the episode above.

Watch more:

Fireflies episode 5: The brutal larvae

Fireflies episode 4: The secret of light

Fireflies episode 3: The hunting world

Fireflies episode 2: The master of disguise

Fireflies episode 1: The hostile forest for the fireflies

(Cover image designed by CGTN's Li Xiaojie.)

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