Abstract
An ecological survey of birds of Mt. Kurikoma area was made during summer, early autumn and early winter in 1965. Fourteen-five species, 23 Families, of birds were recorded. The difference of avifauna and its vertical distribution in summer and winter were compared: Bush-Warbler (Cettia diphone), Grey Wagtail (Motacilla cinerea), and Bullfinch (Pyrrhula pyrrhula) which had been abundant in summer were replaced by Coal Tits (Parus ater) and Dusky Thrush (Turdus naumanni) in winter. Habitat segregation was noted vertically between Nutcracker (Nucifraga caryocatactes) and Jay (Garrulus glandarius) and where their distributions overlapped there was an interspecific competition because violent fightings were observed between them. Correlations of vegetation and species and abundance of birds around Mt. Kurikoma were described and tabled.
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