That's all bioluminescence. So, like I said just like fireflies.

The trees, mangrove trees, are filled with fireflies communicating with light.

Now, usually if people are familiar with bioluminescence at all, it's these guys it's fireflies.

There is one case that we have begun to understand better, and it's the case of fireflies.

This bacterium has the special property that it makes light, so it makes bioluminescence, like fireflies make light.

But in Southeast Asia places like Thailand or Malaysia or Borneo there's a beautiful cooperative behavior that occurs among male fireflies.

Specifically, it's male fireflies who are all flashing in perfect time together, in perfect synchrony, to reinforce a message to the females.

And we used to see the most mysterious animals out the window that you couldn't describe these blinking lights a world of bioluminescence, like fireflies.

If you see fireflies in North America, like so many North American sorts of things, they tend to be independent operators. They ignore each other.

And it really struck me as the years went by, in a very negative way, when I would go to some stream that I'd loved, and was used to walking through this field that was once filled with fireflies, and now had a strip mall or a bunch of condos on it.