Hermit thrush uses elements of human music to create bird song - CDN ex-pat

I think that this may be what Alan Cross refers to as "an unfortunate sonic coincidence."

She decided to examine the hermit thrush’s song more closely. The bird’s song is usually very high and fast, so she slowed it down and lowered the pitch a few octaves to something “more comfortable for human ears.

”As soon as I did that, I started hearing that many of their songs actually followed the overtone series.”