Before I just want to let you know at the end of this episode I'll be telling you about the amazing animations that we've made to go with the podcast

including one all about this episode. Honestly, you just have to see them. The information about where they are

and how to find them coming up. Has this ever happened to you? You're sitting quietly at home or at work and suddenly

there's a loud thud on the window. And when you turn to look all you can see is a fine

dusty imprint of a bird that's flown directly into the glass.

These imprints are often very beautiful, with a fine detail of the feathers clearly visible.

But what looks like dust is actually powder, a substance

that helps many birds protect new growing feathers. These collisions are not an occasional event.

Ornithologists estimate that in the United States alone,

more than 350 million birds die each year

when they hit glass windows, walls and other structures,

making this one of the most significant smarter from the BBC World Service.

The podcast that explores some of the amazing ways in which animals have inspired us and solved

human challenges.

If you've enjoyed the series so far, then you know what to do.

Spread the word and drop us a rating telling us about your favorite parts of the show.

And remember we want your expertise too. What examples do you know about that could feature

in our podcast? If anything comes to mind please email us at 30 animals at BBC.com or you can

contact us via our website, BBCWorld Service.com slash 30 animals. In this episode number 19, we'll be hearing how spider webs have inspired a glass.

In this episode number 19, we'll be hearing how spider webs have inspired a glass to help reduce

the number of potentially fatal collisions birds have with windows.

And that has got to be good news.

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