Abstract
Fauna and seasonal fluctuation of flies were surveyed in 4 points of swine houses of Takikawa Animal Husbandry Experiment Station, Takikawa, Hokkaido from April to December in 1977 and 1978. Total flies collected by fly-paper strips were 32,506,belonging to 8 families, 13 genera and 20 species, of which Musca domestica constitutes 86.7%, 7.4% in Fannia canicularis, 5.3% in Tephrochlamys japonica, 0.3% in Muscina stabulans and the rest of 16 species constitutes less than 0.1%. Emergence of M. domestica was observed from the end of April to the end of November, F. canicularis from the middle of April to the middle of November, and M. stabulans from the beginning of June to the middle of October. The large populations of those species were seen in July and August. While, the emergence of T. japonica was observed from the early part of April to the end of November, and the first and the second large populations were seen in May and October, respectively.
