Moth Glider : Bugged sound effects?

[Uhtameit.2413]

Hi,

Here's a video from two years ago displaying the glider :

You hear wings flapping and that's about it.

Here's footage from the glider as it currently is :

Why am I hearing seagulls when I open the glider? Are moths able to make seagull noises? I'm so confused :C. I think I can hear waves too...