Bird vs Flying Machine

Listening back to some field recording I have been doing in Southern Spain recently, I came across a really interesting section of sound that I want to share with you. What you can hear is a plane flying overhead and a cacophony of birds twittering and singing away in the foreground.

This was recorded just with the stereo mic of my portable recorder, and the way that the two distinct sounds are so well balanced has set off so many thoughts and questions for me regarding the relationship between man and nature, how we emulate, recreate and then feedback so many things from the natural world, and how nature continues to adapt and interact with the things we throw at it.

I know studies have been done that prove that birds sing louder and higher pitched in cities than the countryside, and I wonder if the roar of an aeroplane has the same effect.