Sheep, Insect pests, Calliphora placida, Calliphora varifrons, Chrysomya rufifacies, Chrysomya varipes
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Unlike primary species of blowflies, the secondary and tertiary species of flies cannot initiate a strike, but their activity in the presence of the primary blowflies becomes significant in the death of struck sheep. This is particularily so when the hairy maggot blowfly is involved. Future management of sheep flocks to minimise deaths may require recognition of these secondary and tirtiary flies.
This article presents some basic facts about these flies.
"Flystrike in sheep : secondary and tertiary flies striking sheep in Western Australia,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 20:
2, Article 6.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol20/iss2/6