Monitoring bird populations - Introduction
　　Tatsuya Amano 　　p. 1 - 2

Wild bird indicators: using composite population trends of birds as measures of environmental health
　　Richard D. Gregory and Arco van Strien 　　p. 3 - 22

Population trends of common wintering waterfowl in Japan: participatory monitoring data from 1996 to 2009
　　Satoe Kasahara and Kazuo Koyama 　　p. 23 - 36

Changes in the avifauna of the Hokkaido University campus, Sapporo, detected by a long-term census
　　Tomoyuki Namba, Yuki Yabuhara, Kazutoshi Yukinari and Reiko Kurosawa 　　p. 37 - 48

Silent night in Japanese rice fields? A population decline in the Greater Painted Snipe
　　Tatsuya Amano, Mei-Hua Li and Hoshiko Yoshida 　　p. 49 - 53

Relationship between census efforts and the number of species encountered in line transect censuses of breeding bird populations in woodland and grassland habitats of eastern Hokkaido
　　Katsumi Tamada 　　p. 55 - 65

Great Spotted Woodpeckers Dendrocopos major detect variation in wood hardness before excavating nest holes
　　Shigeru Matsuoka 　　p. 67 - 74

Seasonal and sexual differences in migration timing and fat deposition in the Greater White-fronted Goose
　　Sachiko Moriguchi, Tatsuya Amano, Katsumi Ushiyama, Go Fujita and Hiroyoshi Higuchi 　　p. 75 - 82

A temporal rule in vocal exchange among Large-billed Crows Corvus macrorhynchos in Japan
　　Noriko Kondo, Shigeru Watanabe and Ei-ichi Izawa 　　p. 83 - 91

Experimental study of the effect of clutch size on nest defense intensity in Black-tailed Gulls
　　Kentaro Kazama, Yasuaki Niizuma and Yutaka Watanuki 　　p. 93 - 100