Arctic Jaeger

Arctic Jaeger Stercorarius parasiticus

Migration visitor. Common around Japan in spring and autumn. Told from a few birds stay in winter, but details unknown.

Fig. 1. Adult breeding.
Fig. 2. Adult breeding. Same bird as Fig. 1.
Fig. 3. Adult breeding. Same bird as Fig. 1.
Fig. 4. Adult breeding. Same bird as Fig. 1.
Fig. 5. Adult breeding. Same bird as Fig. 1.
Fig. 6. Adult breeding. Same bird as Fig. 1.
Fig. 7. Adult breeding.
Fig. 8. Dark-morph Adult. Off Tomakomai, Hokkaido. 24 Aug 2019.
Fig. 9. Dark-morph Adult. Same bird as Fig. 8. Off Tomakomai, Hokkaido. 24 Aug 2019.
Fig. 10. 2nd-year?
Fig. 11 2nd-year? Same bird as Fig. 12.
Fig. 12. Juvenile.
Fig. 13. Juvenile. Off Esan, Hokkaido. 11 Aug 2019.
Fig. 14. 1st-year? Off Choshi, Chiba Pref. 19 Jun 2011.