Least Auklet

Least Auklet Aethia pusilla

Common as winter visitor. They are normally seen at off Hokkaido and the northern part of Honshu.

Fig. 1. non-breeding.
Fig. 2. non-breeding. Same bird as Fig. 1.
Fig. 3. molting to breeding.
Fig. 4. molting to breeding. Same bird as Fig. 3.
Fig. 5. molting to breeding.
Fig. 6. non-breeding birds with Brunnich’s Guillemot.