Life Cycle - Oestrus ovis - Nasal Bot Fly

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Adult Oestrus ovis lay 1st stage larvae in the nares of the sheep.  The larvae then crawl farther inside the nasal cavity until it reaches the nasal sinuses.  It lives in the nasal sinuses where it

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Life Cycle - Oestrus ovis - Nasal Bot Fly

Internal morphological changes during metamorphosis in the sheep