Reptiles aren’t known for their parental instincts, but the giant South American river turtle is an exception. The discovery is spurring a race to save the chatty species.
Then Ferrara — who works for thehatchings
South American river turtles live throughout the Amazon river basin and return to the river banks every dry season, between May and October, to lay their eggs. When Ferrara began studying turtle communication, “so many people looked at me and said, ‘Oh, how? I don’t think that turtles use sound to communicate,’” she said.Known locally as the arrau or tartaruga da amazonia, the giant South American river turtle lives throughout the Amazon and its tributaries. During the dry season, thousands of females at once crawl onto beaches along the river to lay their eggs.For other kinds of turtles, the mothering usually ends at the beach.
So Ferrara and her colleagues wondered: are mother turtle and child turtle communicating with one another? To test the idea, her team sent months taping the turtles — on land and underwater, in the wild and in a swimming pool.Embryos appear to chirp together to coordinate hatching and digging up to the surface. With so many jaguars and other predators lurking, it is safer for baby turtles to move en masse toward the river.
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