About the Authors

Go Fujita

go@es.a.u-tokyo.ac.jp

Affiliation Laboratory of Biodiversity Science, School of Agriculture and Life Sciences, University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, 113–8656, Japan

Atsuki Azuma

Affiliation Faculty of Agriculture Environmental Sciences for Sustainability, Iwate University, Ueda 3-18-8, Morioka city, Iwate, 020–8550, Japan

Jun Nonaka

Affiliation Goshawk Protection Fund, Hanawada, 2-5-1, Utsunomiya city, Tochigi, 320–0027, Japan

Yoshiaki Sakai

Affiliation Association for gray-faced buzzards in Inzai, Kigari 3-9-1, Inzai city, Chiba, 270–1359, Japan

Hatsumi Sakai

Affiliation Association for gray-faced buzzards in Inzai, Kigari 3-9-1, Inzai city, Chiba, 270–1359, Japan

Fumitaka Iseki

Affiliation Institute for endangered species, Sadanomi, 750–2, Oita city, 879–0122, Japan

Hiroo Itaya

Affiliation Ryokusei Kenkyujo, Kojimacho, 2-40-10, Chofu city, Tokyo, 182–0026, Japan

Keita Fukasawa

Affiliation National Institute for Environmental Studies, Japan, Onogawa, 16–2, Tsukuba city, Ibaraki, 305–0053, Japan

Tadashi Miyashita

Affiliation Laboratory of Biodiversity Science, School of Agriculture and Life Sciences, University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, 113–8656, Japan

Competing Interests

One of the authors, Hiroo Itaya, is employed by a commercial company, Ryokusei Kenkyujo Inc, but we confirmed this does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Analyzed the data: GF KF. Wrote the paper: GF. Conception and design of this study: GF TM. Design of analysis: GF KF TM. Acquisition of data: AA JN YS HS FI HI. Interpretation of data: GF AA JN YS HS FI HI KF TM.