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Examines changes in the rate and success of bush fly or Musca vetustissima breeding during winter and spring in an overwintering area in Australia. Association of low survival of eggs and larvae in the food from May to August with rainfall; Effects of predation; Basis for explaining the major increase in adult bush fly abundance observed in some areas in mid-spring.

Focuses on the factors that affect the populations of the bush fly Musca vetustissima in south-western Australia. Examination of flies sampled in the field; Effect of the major improvement in cattle dung on bush fly abundance; Characteristics of the bush fly.

Investigates the seasonal distribution and characteristics of bush fly Musca vetustissima in the agricultural region of south-western Australia. Increase in the abundance of bush flies throughout the overwintering zone in early spring as a result of local breeding; Importance of constant dispersal as the basis of bush fly's ubiquity; Location of bush fly populations during spring.