Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Fuligula raffinis.
February 23, 1910.
I caught a drake which had been winged.
The bone had knitted but the bird was somewhat thin.
The head and neck were black, but not
the fore part of the breast as in full adults. The
black and white lines across the back were
not complete either. The flank feathers were
of a brownish gray color. The upper fore part
of the breast was of a brownish gray color,
where in adults it is black. I suppose these
features are because of immaturity.