Bryan’s Shearwater

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Bryan’s Shearwater Puffinus bryani

This species was described new species in 2011 (Pyle et al., 2011).

In Japan, several birds collected on Bonin Is; Chichijima, Hahajima and several abandoned Is since 1997. 

At sea, the first bird seen off Mukojima, Bonon Is in 2009. After that, several birds seen at same area and around N Izu Is. Especially there are several records off Mukojima in early spring; Mar, and mid-summer to autumn; Aug-Sep. Perhaps going north in summer; Jul-Aug, because at least 4 birds seen N Izu Is; around Hachijyojima.

Breeding site found Higashijima; Bonin Is in 2015, and other small abandoned islands recorded call and corpse, these islands may be breeding site. Breeds Nov-Apr?

Our records; 

Off Mukojima, Bonin Is; 6 birds in Sep 2009, 1 bird in Sep 2012, 3 birds in Sep 2014 and 1 bird in Sep 2018, 2 bird in Sep 2020.

Off Minami Iwo-jima, Volcano Is; 1 bird in Sep 2009.

Off Hachijyojima, Izu Is; 1 bird in Aug 2017.

Fig. 1. Off Mukojima, Bonin Islands, Tokyo. Sep 20 2020.
Fig. 2. Same bird as Fig. 1. Off Mukojima, Bonin Islands, Tokyo. Sep 20 2020.
Fig. 3. Off Mukojima, Bonin Islands, Tokyo. Sep 7 2014.
Fig. 4. Off Mukojima, Bonin Islands, Tokyo. Sep 7 2014.
Fig. 5. Off Mukojima, Bonin Islands, Tokyo. Sep 12 2012.
Fig. 6. Same bird as Fig. 5. Off Mukojima, Bonin Islands, Tokyo. Sep 12 2012.
Fig. 7. Same bird as Fig. 5. Off Mukojima, Bonin Islands, Tokyo. Sep 12 2012.
Fig. 8. Off Mukojima, Bonin Islands, Tokyo. Sep 15 2009.
Fig. 9. Same bird as Fig. 8. Off Mukojima, Bonin Islands, Tokyo. Sep 15 2009.
Fig. 10. Off Hachijyo-jima, Izu Islands, Tokyo. Aug 3 2017.
Fig. 11. Off Mukojima, Bonin Islands, Tokyo. Sep 18 2018.
Fig. 12. Off Mukojima, Bonin Islands, Tokyo. Sep 21 2020.
Fig. 13. Off Mukojima, Bonin Islands, Tokyo. 28 Aug. 2022