Ornithological illustration of the Wind-up Bird

While searching for a visual representation of the wind-up bird, I found a picture depicting two birds upside down.  Their feet are like springs that can be wound-up.  Interestingly, the back of the bird whose spring is not wound-up resembles the dorsal fin of a fish, and it looks like its got fish scales.   

The phrases scribbled on the paper are descriptions of the wind-up bird taken from the novel pages eight and nine.

 

Source:

http://www.korou.amasoong.com/index.php?/gallery/wind-up-bird-an-ornithological-illustration/