Rodent Bot Fly Larva removed from dissected mouse in Canada

Subject: A botfly in the far North?
Location: Far North, Ont., Can.
September 15, 2013 9:23 am
I caught a mouse one night and found that there were four huge bumps on its back. I looked closer and saw what appeared to be botfly larvae in holes on each bump. I froze it and gave it to our local science teacher who dissected it with her class. Here’s a picture of what they dissected. Sure looks like a botfly to me!
I live in Fort Albany First Nation, Ontario, Canada, and I am surprised that there are botflys this far North! But is it really a botfly?
Signature: FAFN Resident

Rodent Bot Fly Larva removed from Dissected Mouse
Rodent Bot Fly Larva removed from Dissected Mouse

Dear FAFN Resident,
We concur that this is a Rodent Bot Fly Larva.  According to BugGuide Data, Bot Flies are found in Canada.

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BugMan aka Daniel Marlos has been identifying bugs since 1999. is his passion project and it has helped millions of readers identify the bug that has been bugging them for over two decades. You can reach out to him through our Contact Page.

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