Figure 1. Changes to hair colour in the development of Cygnus atratus.
Black or white
The difference between a human and a black swan is that as a human grows older, he/she starts getting white hair. The reverse happens with the black swan. As the cygnet ages, it grows black hair (see Figure 1).
Figure 1. Changes to hair colour in the development of Cygnus atratus.
![thumbnail]( "Black or white")
Figure 1. Changes to hair colour in the development of Cygnus atratus.
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