Prey Items Delivered to Young Northern Goshawks Accipiter gentilis by a Single Pair Breeding in Central Tokyo, Japan

Haruka Mizumura; Teruaki Ikeda; Toshio Kawasaki; Fumio Shiratori; Hidehiko Seto; Yoshiomi Kunishima; Yoshiaki Takahashi; Tomohiro Ichinose; Hiroyoshi Higuchi

doi:10.2326/osj.17.229

Ornithological Science

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Prey Items Delivered to Young Northern Goshawks Accipiter gentilis by a Single Pair Breeding in Central Tokyo, Japan

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Authors: Haruka Mizumura¹, Teruaki Ikeda², Toshio Kawasaki³, Fumio Shiratori⁴, Hidehiko Seto⁵, Yoshiomi Kunishima⁶, Yoshiaki Takahashi⁷, Tomohiro Ichinose^1,8, Hiroyoshi Higuchi⁸

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Source: Ornithological Science Volume 17, Issue 2, 229 - 235 (2018); http://dx.doi.org/10.2326/osj.17.229

Publisher: UniBio Press

Abstract

We examined the diet of young Northern Goshawks Accipiter gentilis before and after fledging through the direct observation of prey items delivered by a single pair breeding in central Tokyo. Observations were conducted from 13 May to 14 August 2015. Three hundred prey items primarily belonging to five bird species and two genera of mammals were recorded both before and after fledging. The species contributing most to the total diet were White-cheeked Starling Spodiopsar cineraceus and Feral Pigeon Columba livia, with pigeons contributing most to total biomass followed by White-cheeked Starling. Prey item composition differed between the periods before and after fledging. After fledging, the contribution of White-cheeked Starling to the diet decreased, whereas that of pigeon increased.

DOI: http://dx.doi.org/10.2326/osj.17.229

Received 13 8月 2016 Accepted 17 12月 2017

Acknowledgments:

We sincerely thank the bird watchers and amateur photographers who supported our study. We thank Masahiro A. Iwasa, Associate Professor of the Department of Animal Science and Resources, Nihon University, for identifying rats. We are especially grateful to Lisette Robles for helping to improve the draft manuscript, and to Masayoshi Nageishi, Sakurako Motobayashi, Süleyman Akbulut, and Kazuyasu Izawa for improving the English language of the draft text. We also thank the reviewing editor and two anonymous referees for their useful comments on the manuscript. This work was supported by the Incentives to Study and Conduct Research Through SFC Education Promotion Foundation and JSPS KAKENHI Grant Number JP16K08131.

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