Red-throated Loon

Red-throated Loon Gavia stellate

Common, mainly winter visitor around Hokkaido, Honshu, Shikoku and Kyushu. 
It has tendency to stay in Hokkaido in the severe winter season.

Fig. 1. Presumed Adult.
Fig. 2. Presumed Adult. Same bird as Fig. 1.
Fig. 3. Adult winter.
Fig. 4. Adult winter. Same bird as Fig. 3.
Fig. 5. Presumed Adult winter.
Fig. 6. Molting 1st summer?
Fig. 7. Adult winter.
Fig. 8. Adult winter.