If we zoom way in on a blue wing scale, we see these little ridges.

如果我们放大蓝色的翅膀鳞片，我们会看到这些凸起的小长条。

These wing scales are made of a material that's naturally water-resistant. They stay blue in any weather.

这些翅膀由一种天然防水的材料制成。它们在任何天气里都保持蓝色。

The blue comes from the shape of the wing scale itself, and when I learned how this works, it kinda blew my mind.

蓝色来自翼鳞本身的形状，当我知道这其中的原理时，我简直大吃一惊。