Images

There are a lot of bumble bee species out there, about 50 species or so north of Mexico. Some arguments regarding species boundaries, but, bottomline is there are more than most people would suppose. Here is Bombus bifarius. Another common western bee, one a bit more likely to nest above ground than some of the others....sometimes even showing up in bird houses.

Bee of Yosemite. This is Bombus bifarius, a male (see all the yellow on the face shot? that is a good indication of a male bumble bee....not all species show this pattern, but it is a general trend. Females tend to have a nearly all black face with perhaps a topknot of yellow hairs, but I digress).

There are a lot of bumble bee species out there, about 50 species or so north of Mexico. Some arguments regarding species boundaries, but, bottomline is there are more than most people would suppose. Here is Bombus bifarius. Another common western bee, one a bit more likely to nest above ground than some of the others....sometimes even showing up in bird houses.

Bombus variabilis, male, St. Mary's County, Maryland, Nest parasite, now extremely rare

Bombus variabilis, male, St. Mary's County, Maryland, Nest parasite, now extremely rare

More black bumble bees from Yosemite National Park. Here is the male of Bombus vosnesenskii. This species was described by the relatively prolific Polish Taxonomist Oktawiusz Wincenty Bourmeister-Radoszkowski who pumped out a great many new descriptions of bees in many parts of the world.

Bombus occidentalis, female, Wyoming, Yellowstone National Park

Bombus terricola, New State record for Maryland, Garrett County

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An early spring Braconid Wasp in the Agathidinae subfamily (thanks to Bob Kula USDA for the det) captured 3/20/2014 in Beltsville, Maryland, often associated with the parasitization of Moth and Butterfly Larvae.Canon Mark II 5D, Zerene Stacker, Stackshot Sled, 65mm Canon MP-E 1-5X macro lens, Twin Macro Flash in Styrofoam Cooler, F5.0, ISO 100, Shutter Speed 200

This is picture 5 from a 12 picture invited series by Matt Buffington (matt.buffington@usda.gov) at the USDA Parastitic Hymentoptera group using specimens from the U.S. Natural History Museum Smithsonian.

Not all bumblebees gather pollen. Some, like this Bombus citrinus, take over the nests of other bumblebee species and use their workers to provision the nests of their young.

Not all bumblebees gather pollen. Some, like this Bombus citrinus, take over the nests of other bumblebee species and use their workers to provision the nests of their young.

Power...This is Bombus citrinus, a female just emerged from where she hibernated overwinter and looking for the new nests of a queen bumblebee, note the sting on the prominent tail end of this bee, she uses that to eliminate or paralyze the female of another bumblebee, taking over the nest and essentially enslaving the daughters of the queen to now raise her young.

A somewhat bedraggled Bombus crotchii from Yolo County, California..."This bee was collected in the California Central Valley in Yolo County for research on small-scale restoration in agricultural areas. Claire Kremen's 10-year study of hedgerows shows the benefits of planting native shrubs and forbs in agricultural areas for native bees.

Parasite. Nest parasite to be exact. Formerly in the genus Psithyrus these bees are now in the genus Bombus, with the rest of the bumble bees.

Bombus fervidus, female, ,Queen Anne's County, Maryland

Check the eyes out on this male Bumble Bee. We already put up a spread of female B. fraternus, but the male has some pretty unique features for bumble bees. For one, the eyes are HUGE, they nearly meet at the top of the head. Only a few other bumbles do that...and the face is extremely short, with the mandibles almost joined to the bottom of the eyes.

Bombus fraternus - Here is one of the very uncommon bumblebees that are of great concern these days, due to introduced parasites that have caused this species and its sister taxa to crash. Fortunately, they are still around, at least in small numbers.

The most common of all the eastern Bumblebees, Bombus impatiens, is something of the cow/chicken/pig of the non-honeybee world. Now used throughout the continent to fertilize plants in greenhouse cultivation. Note the whitish rather than yellowish light colored hairs and that the first segment of the abdomen has light hairs, but remainder are black.

A bit bedragled specimen of the bumble bee B. melanopygus from Yosemite National Park. We weren't quite up to speed on our hair dressing when we prepped this specimen. Part of Claire Kremen's study of the bees of the park. Photo by Anders Croft.