Matsudaira’s Storm-Petrel

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Matsudaira’s Storm-Petrel Hydrobates matsudairae

Common around Bonin Is and Volcano Is. Endemic. Breeds Jan-Aug. A few birds seen around N Izu Is. Also regularly seen off Choshi, Chiba Pref in Jun-Jul, so probably go north in early summer. Most northern record off Iwate Pref, 30 Jun 2018.

Breeding sites are confirmed on Volcano Is; Minima-Iwo-jima and Kita-Iwo-jima. However, breeding has not been confirmed on Kita-Iwo-jima after the war.

Fig. 1. Off Chiba Pref. 23 Jun 2018.
Fig. 2. Off Chiba Pref. 23 Jun 2018.
Fig. 3. Off Chiba Pref. 23 Jun 2018.
Fig. 4. Off Chiba Pref. 23 Jun 2018.
Fig. 5. Off Chiba Pref. 23 Jun 2018.
Fig. 6. Off Chiba Pref. 23 Jun 2018.
Fig. 7. Off Chiba Pref. 23 Jun 2018.
Fig. 8. Off Chiba Pref. 23 Jun 2018.
Fig. 9. Off Chiba Pref. 23 Jun 2018.
Fig. 10. Off Chiba Pref. 23 Jun 2018.
Fig. 11. Off Chiba Pref. 23 Jun 2018.
Fig. 12. Off Chiba Pref. 23 Jun 2018.
Fig. 13. Off Chiba Pref. 23 Jun 2018.
Fig. 14. Off Chiba Pref. 23 Jun 2018.
Fig. 15. Foraging with Wilson Storm-Petrels. Off Chiba Pref. 23 Jun 2018.
Fig. 16. Foraging with Wilson Storm-Petrels. Off Chiba Pref. 23 Jun 2018.
Fig. 17. Foraging with Wilson Storm-Petrels. Off Chiba Pref. 23 Jun 2018.
Fig. 18. Fly with Wilson Storm-Petrel. Off Iwate Pref. 30 Jun 2018.
Fig. 19. Fly with Wilson Storm-Petrel. Off Iwate Pref. 30 Jun 2018.
Fig. 20. Foraging with Wilson Storm-Petrels and Northern Fulmar. Off Iwate Pref. 30 Jun 2018.
Fig. 21. Foraging with Wilson Storm-Petrels. Off Iwate Pref. 30 Jun 2018.
Fig. 22. Foraging with Wilson Storm-Petrels. Off Iwate Pref. 30 Jun 2018.
Fig. 23.
Fig. 24. Same bird as Fig. 23.
Fig. 25. Adult.
Fig. 26. Adult.
Fig. 27. This bird has very small white primary flash, individual difference? 1st-year birds??
Fig. 28.