Odd Bee, and Tour de France Catalpas

by Carl Strang

In the late afternoon of July 4 I was looking out the kitchen window at my prairie garden plots. Bumblebees, Bombus bimaculatus, were swarming the Culver’s root

and wild bergamot.

They were not showing very good fidelity, individual bees frequently going between the flower species rather than sticking to one. Then I saw a bee that immediately sent me grabbing for my camera. Like the bimaculatus it was moving between Culver’s root and bergamot.

This bee was almost all yellow.

What was wrong about it was the black abdominal segment in the middle of the yellow. If not for that, I would have passed it off as a Bombus fervidus. But fervidus should have a black strip between the wings, as in this one I photographed last year:

I did a web search, and found a photo of a bee somewhat similar to this one at a University of Illinois website. It was identified as an aberrant male Bombus bimaculatus. The eyes of the one in my yard seemed small, however, for a male.

Also, it seems early in the season for males to appear unless, as I suspect from last year’s observations, bimaculatus is limited to the early part of the year and is replaced by another short-tongued species, B. impatiens, in the latter part of the season. I decided to resolve this problem by creating an account in Beespotter and submitting my photos to the specialists there. I’ll report back with the results later.

P.S. In last night’s TV coverage of the Tour de France, the broadcast announcers’ table was placed in front of some catalpa trees in bloom. The British and American announcers all wondered aloud at one point what the trees were. I’m not sure which catalpa species it was, but clearly these or their ancestors had been transplanted from North America to that location in Spa, Belgium, for their floral display at this time of year.

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3 Comments

  1. Katie said,

    July 6, 2010 at 6:39 am

    Nice post. I’ve been paying more attention to bumble bees lately. Too bad Beespotter only takes submissions from IL… Now if I can only find something like this for CA.

  2. Christine said,

    July 6, 2010 at 1:19 pm

    I always try to identify the bees in my garden enjoying lavender and salvia, but I never have any luck, very difficult! I’m enjoying your blog and learning a great deal too.

  3. July 25, 2010 at 8:34 pm

    […] Beespotter folks got back to me in recent days and confirmed that the odd bumblebee I reported earlier was indeed a male Bombus […]


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