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.

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).

The head of Bombus bimaculatus, our earliest spring bumblebee, unlike some of the other species it is still very common in most parts of the eastern United States and by late June/July you can see that the nests are producing males and beginning to wind down the season for the species. This one was collected by Laura Russo somewhere near State College Pennsylvania.

A common spring bumble bee, Bombus bimaculatus, one of the species of bumble bees that have not seemed to have declined since the introduction of Nosema bombi a parasite from Europe. This one was collected by Laura Russo near State College Pennsyvania.

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

A western bumble bee. Bombus californicus is a reasonably uncommon dark-winged Bumble bee that ranges from the Rockies to the West and whose populations may have been knocked back by the same pathogen suite as the gone or nearly gone species such as B. affinis and B. franklini.

The odd case of Bombus citrinus. This species is a nest parasite on other Bumble Bees and as is the case in many, if perhaps not all, the parasitic species it has an unusually long top of the head...in other words the distance from the ocelli to the back of the head is longer than in other species.

This bumblebee is a nest parasite of other bumblebees....mostly B. impatiens. The parasite kills or disables the host queen and then has the workers from the host bee raise her babies.

A parasite of other bumblebeeds, B. citrinus, is the most common parasitic species in the East, but, as a parasite this still means it is very uncommon. The tale is simple, this species invades a nest, eliminates queen, and makes workers raise its own young.

Some bumble bees are parasites. A common theme in the bee world...to the tune of about 20% of all the species. Why go to all that work gathering pollen when you can just lay your egg in someone else's nest. Then in an evolutionary spy vs.

Some bumble bees are parasites. A common theme in the bee world...to the tune of about 20% of all the species. Why go to all that work gathering pollen when you can just lay your egg in someone else's nest. Then in an evolutionary spy vs.

A parasite of other bumblebeeds, B. citrinus, is the most common parasitic species in the East, but, as a parasite this still means it is very uncommon. The tale is simple, this species invades a nest, eliminates queen, and makes workers raise its own young.

Some bumble bees are parasites. A common theme in the bee world...to the tune of about 20% of all the species. Why go to all that work gathering pollen when you can just lay your egg in someone else's nest. Then in an evolutionary spy vs.

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.

The giant bumblebee (Bombus dahlbomii). A denizen of the southern Andes and widely believed to be in decline due to competition and perhaps spread of pathogens with two introduced European bumblebees that have invaded the region. You notice this bee when it flies by. Dramatically orange with yellow highlights on the traditional deep black integument of bumblebees.

A lovely slightly florescent orange bumble bee from Taiwan. So many combinations of color and form in each genus of bee! Photography Information: 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.

A lovely slightly florescent orange bumble bee from Taiwan. So many combinations of color and form in each genus of bee! Photography Information: 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.

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.

From the U.S. National Arboretum comes the now relatively uncommon Bombus fervidus. A species in delcine, but still present and how nice to have this one present right in Washington D.C. Pictures by Ashleigh Jacobs.