Very little is known about this species and research is required to obtain an understanding of its ecology. Based on the ecology of closely related species, P. bannermani is likely to feed on fish, squid and cephalopods by surface-seizing, underwater pursuit, including diving and plunging, and pattering (del Hoyo et al. 1992, Brooke 2004). It is likely to nest in rock crevices or burrows and form colonies (del Hoyo et al. 1992).

Puffinus bannermani is a little-known species that breeds on Higashijima, Bonin Islands, and on Minami-Iwoto, Volcano Islands in the Ogasawara group, Japan. Its at-sea range is thought to be fairly local to these islands (Onley and Scofield 2007). A fledgling was recently collected on Chichi-Jima (Onley and Scofield 2007).

Conservation Actions Underway
Rats were eradicated on Higashijima in 2008-2009. Eradication has been attempted on other islands, but introduced rats remain on over 20 islands in the Bonin group (Kawakami et al. 2012).

Conservation Actions Proposed
Carry out surveys to find breeding locations and assess the population size. Study the species's ecology. Monitor population trends through coordinated surveys. Assess the impacts of introduced rats on this species and the severity of other potential threats. Conduct further rat eradication programmes. Strictly protect suitable breeding areas.