Emergence times of male Bombus terrestris

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MarkH
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Joined: 26/04/2013 - 11:24
Emergence times of male Bombus terrestris

Hello,
Does anyone have an idea when and for how long male bumble bees (specifically B. terrestris) can be seen in the UK? Are there any predictions for this year?
Thanks,
Mark

Nigel Jones
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Hi Mark, Others may have a

Hi Mark,

Others may have a better idea than me, but I see male Bombus as early as mid-May some years (I suspect not this year though), and usually see the largest numbers in late June - July. Not sure about B. terrestris specifically though.

 

Regards

Nigel Jones

 

colonus
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Joined: 02/04/2013 - 20:34
Flight period dates of male Bombus terrestris

Hallo Mark
The dates of flight of male B.terrestris will of course depend to some extent where you are in the country and the weather during the next two or three months. The winter was particularly severe and the early spring cold. The main emergence of B.terrestris queens from hibernation was late. However in the N.Hants/Berks/Surrey area a few queens emerged in mid Feb and early March and there have been a very small number of workers about since 14 April. In general I would expect that this will be a late season.
I suggest you read Ted Benton, Bumblebees of Essex, Lopinga Books (2000), pages pages 65-70 and Ted Benton, Bumblebees, Collins (2006), pages 322-328. In the latter (page 324) he discusses how "...some colonies switch to the production of (mainly male) sexuals early in the season, while others switch later, producing mainly daughter queens...."
Steve Farmer.

MarkH
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Last seen: 6 years 5 months ago
Joined: 26/04/2013 - 11:24
thanks for your help! i'll

thanks for your help! i'll check out those books.

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