If you haven't watched it already, you should check out 'Dancing With The Birds' on Netflix. Maybe I'm biased being a huge bird lover, but man that movie left me in awe. This scene in particular...
https://youtu.be/Eg0iSIHIK34
You might enjoy the superb lyre bird imitating sounds as mind boggling as a chainsaw--and when I say imitate, I mean I couldn't have distinguished the lyre bird sound from a real chainsaw. It's really mind-boggling to me.
Many compress quite a lot before uploading. For gaming for example, I noticed significant improvement if I uploaded the 100Mbps raw data from Shadowplay compared to say a 25Mbps intermediate version.
I also think the depth of field is helping a lot. By blurring out the background the bits can be spent encoding the details of the plumage.
https://www.youtube.com/watch?v=mSB71jNq-yQ