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Nest and Roost Characteristics of the Ruddy-Breasted Crake Porzana fusca on Minami-Daito Island
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Abstract
Abstract
We found five Ruddy-breasted Crake Porzana fusca nests in a swamp among emergent vegetation, and one in a dry sugarcane field more than 500 m (radius) from any swamp or pond, on Minami-daito Island. Nests were saucer-shaped. All of the nests in the swamp fledged chicks. It is assumed that nesting in such habitat renders nests safe from ground predators such as introduced weasels and feral cats. Roosts were similar in structure to nests, but lacked lining. It is inferred from one observation that males and females roost together at night before the egg-laying period.
Received 25 3月 2017
Accepted 29 9月 2017
Acknowledgments:
We wish to express our gratitude to Tetsuya Iwasaki, Kiyoshi Asanuma, Junichi Gima, Reiko Gima, Kazuaki Higashi, Mitsunori Okuyama, Hitomi Abe, Akira Sawada, and Narumi Aso for kindly supporting our field research. We appreciate the thoughtful comments on the manuscript of two anonymous referees. M.T. received funds from JSPS Kakenhi (Grant Number 16H04737).
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