Magnificent Frigate Birds (Fregata magnificens) and Great Frigate Birds (Fregata minor): The male birds have huge red air balloons under their beaks in order to attract the females. We observed their mating dance during which the male shakes his wings violently. After a male finds a female for mating, the air balloon deflates for the season. Males which do not get a mate must fly around with the big red balloon until next year.
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