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Science Quickly

This Dragonfly Outmigrates Monarchs

Science Quickly

Scientific American

Science

4.41.4K Ratings

🗓️ 7 March 2016

⏱️ 2 minutes

🧾️ Download transcript

Summary

The dragonfly Pantala flavescens can travel 9,000 to 11,000 miles, and may interbreed across the globe. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

This is scientific American's 60 second science. I'm Christopher Intalyata. Got a minute?

0:07.0

Monarch butterflies are famous for their long haul to Mexico, a migration of more than 2,500 miles.

0:14.2

But far more impressive is a species of dragonfly,

0:17.0

pantala flavescens.

0:18.9

It's commonly known as a globe skimmer,

0:20.8

and it lives up to its name, migrating between 9 and 11,000 miles.

0:26.0

Being really good at gliding, being able to take advantage of winds, being able to track rainy seasons, having short developmental times, because the larvae can develop very, very quickly.

0:36.5

All those factors, according to Rutgers Evolutionary Biologist Jessica Ware,

0:41.0

suggests that dragonflies may actually be one huge global population of interbreeding

0:45.8

insects.

0:47.2

To test that idea, Ware and her colleagues sequenced DNA from Dragonflies, collected

0:51.4

in Guyana, Japan, Korea, India, Canada, and the US.

0:56.4

And since the genes they'd sequence tend to mutate very quickly, if the populations were

1:00.5

not interbreeding, you'd expect to see differences from region to region.

1:05.0

Instead, they found dragonflies in Japan that were more closely related to ones from

1:09.0

Giana than their own Japanese cousins.

1:12.0

And that pattern of cross-continental similarities held true around the world.

1:16.7

This is a really compelling story that this is a species of the entire planet of the Earth.

1:22.4

It's not regional. The region is the planet.

1:24.8

The results appear in the journal Plus 1. As a truly global species though, how will

1:31.2

it react to global change?

1:33.0

If anything, climate change might just affect, you know, where it's able to set up these other

...

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