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The insectivorous willie wagtail, Rhipidura leucophrys,exhibits a range of discrete, easily identified foraging behaviours thatinclude wagging the tail and flashing the wing. We investigated whetherwagtails adjust these, and other foraging behaviours, according to the time ofday and environmental conditions. The rates of tail-wagging and wing-flashingwere influenced by the time of day and light intensity. Tail-wagging was morefrequent at the start and end of the day, while wing flashing was morefrequent during the middle of the day. The rate of aerial prey captures wasalso highest during the middle of the day and lower in the early morning andlate afternoon. These daily patterns of foraging behaviours correspond withthe patterns of insect activity, which was greater in the middle of the daythan in the early morning or late afternoon. The field data, together withexperiments using a model wagtail tail, support the view that tail-wagging andwing-flashing are used to flush insect prey.

The influence of time of day and environmental conditions on the foraging behaviours of willie wagtails, Rhipidura leucophrys