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Moose Botfly

Cephenemyia ulrichii


Cephenemyia ulrichii or the moose botfly, sometimes also called an elk botfly or moose nose botfly or moose throat botfly, is a large botfly that resembles a bumblebee. In the wild, they attack chiefly the nostrils and pharyngeal cavity of moose (known as elk in Europe), but have been found in deer. There have also been several cases of C. ulrichii squirting their larvae into the eyes of human beings, a painful event that requires medical attention to forestall serious damage.


C. ulrichii are common parasites of moose in northeastern parts of Scandinavia, but have recently expanded their range into southern Sweden. They have also been reported in Denmark, northeast Norway, and the Baltic states. Although once thought to be very species specific to Alces alces (Moose), they have recently been found in roe deer (Capreolus capreolus) near Helsinki. And I guess my spotting would be another case which proves that they parasite also on roe deer in Denmark since the spot I found it is a place always with a few of roe deers.


In Scandinavia, the only species present are ‘‘C. trompe’‘ and ‘‘C. ulrichii in this case C. trompe would fit better the habitat it's found since in Denmark we have no Moose and the place found we have only roe deer.

1 Species ID Suggestions

Cephenemyia sp.
Deer Bot Fly or Nose Bot Fly Family Oestridae Cephenemyia sp.

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FaredinAliyevski 7 years ago

Thanks, I did remvoe it just for you :). I see it for the first time as well but now I know next time I see it I will be running away instead falling in love with it :)

Tiz 7 years ago

Great spotting! And interesting facts!! Perhaps you should remove the [1] in the text thugh :) I have never seen this one before.

FaredinAliyevski 7 years ago

Thanks for this amazing information, had no idea about this. I must learn more about this amazing creature.

LaurenZarate 7 years ago

Great picture by the way!

LaurenZarate 7 years ago

This looks like a Deer Bot Fly, Cephenemyia sp., Family Oestridae. It may look like a cutie but they are awful parasites of Cervids. They eject live larvae into the nostrils of deer where they migrate to the back of the tongue and mature into large fat grubs. They are eventually coughed or sneezed out and pupate in the soil. The adults emerge only to mate and reinvest other deer. They look like cute bumble bees but lack mouthparts. The shape of the head is typical of bot flies.

Spotted by

Region Hovedstaden, Denmark

Spotted on Jun 24, 2013
Submitted on Jun 24, 2013

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