Shag with white feathers

Shag with white feathers

Observation - Shag with white feathers. Description: One of the Shags I photographed today had very long, fine, white feathers on each side, at the back of its head. I haven't noticed such feathers before. Is it normal?

One of the Shags I photographed today had very long, fine, white feathers on each side, at the back of its head. I haven't noticed such feathers before. Is it normal?