Images

Male Andrena cressonii from Dorchester County, Maryland

One of the most common Andrena in the East, as well as throughout the US and southern Canada. Here we have the male of Andrena cressonii. This species shows up across many habitats, weedy, wooded, agricultural, lawns, suburbs, and wildlands.

This is a west coast Andrena....found, in this case, in Redwoods National Park right along the coast. I hope to get some more shots of the back and sides which have lovely patches of green hairs, an unusual color for bees in North America.

A bee that feeds its babies a restricted diet. In this case that diet is that of Geranium pollen. While I didn't check this specimen from Virginia those lovely pollen grains on its hind legs are very likely Geranium.

Andrena distans...this girl has been dipping into the wild geranium pollen to feed her babies. Photograph by Dejen Mengis.

A somewhat odd position with its pollen covered (likely geranium pollen) leg out and its head cocked towards us. Photoshopping by Thistle Droege and photograph by Brooke Alexander.

Andrena dunningi. A large dark Andrena. This lovely female, in fresh plumage, is relatively easy to identify simply by the orange brown color of its body hairs along with the nearly black hairs located on its hind legs which it uses to carry pollen to its nest.

Andrena erythronii, female

Know Your Wild Bees Campaign - Andrena female ID...this group can dominate on blooming trees and shrubs in the spring, but smaller numbers occur in the Fall on our composites

A very early spring bee, covered in pollen, collected by a homeowner in Bowie, Maryland, often found on maples

A very early spring bee, covered in pollen, collected by a homeowner in Bowie, Maryland

Another member of the difficult to identify Trachandrena subgenus of Andrena. I think that I have the females sorted out (more or less) but the males...oi! This specimen from Maryland. Picture by Amanda Robinson.

Another member of the difficult to identify Trachandrena subgenus of Andrena. I think that I have the females sorted out (more or less) but the males...oi! This specimen from Maryland. Picture by Amanda Robinson.

There are a group of bees in the genus Andrena that form a fairly distinct subgenus called Tracandrena. They are notorious for being difficult to separate out and, in particular, the males all look pretty much the same. I have created a little Excel spreadsheet that help separate out the females, if anyone is interested.

Middlesex County, Massachusetts

An odd, dark Andrena bee of deep sandy areas that comes out in the middle of summer

Andrena fulvipennis "“ A very rare species this male was captured in an old sand pit in Anne Arundel County, Maryland. This species is only found in deep, permanently sandy locations. Picture taken by Brooke Alexander.

Andrena fulvipennis "“ A very rare species this male was captured in an old sand pit in Anne Arundel County, Maryland. This species is only found in deep, permanently sandy locations. Picture taken by Brooke Alexander.

Andrena fulvipennis "“ A very rare species this male was captured in an old sand pit in Anne Arundel County, Maryland. This species is only found in deep, permanently sandy locations. Picture taken by Brooke Alexander.

An often uncommon spring Andrena, I associate with the Appalachians, this is a male with a sweet yellow clypeus. Collected by MaLisa Spring near Marietta, Ohio. Photograph by Brooke Alexander. 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

An often uncommon spring Andrena, I associate with the Appalachians, this is a male with a sweet yellow clypeus. Collected by MaLisa Spring near Marietta, Ohio. Photograph by Brooke Alexander. 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