A complete table of the data is available from Leo Shapiro (lshapiro@umd.edu), Sam Droege (sdroege@usgs.gov), or the refuge biologist.
Below is a table of the site numbers and a brief site description followed by a table of results.
| Site | Description |
| 5620 | PWRC Site 1: South Tract, by Hardy Spring Pond |
| 5621 | PWRC Site 2: Central Tract, right side of Cedar Lane by power lines |
| 5622 | PWRC Site 3: North Tract, by Telegraph Road |
| 5623 | PWRC Site 4: North Tract, Right side by Scout Site 1 |
| 5624 | PWRC Site 5: North Tract, Wildlife loop by storage sheds |
Site Locations
Results
| name | 5624 | 5621 | 5620 | 5622 | 5623 | Grand Total |
| Agapostemon texanus | 1 | 1 | ||||
| Agapostemon virescens | 7 | 1 | 8 | |||
| Augochlorella aurata | 2 | 3 | 1 | 3 | 9 | |
| Ceratina calcarata | 3 | 3 | ||||
| Ceratina dupla | 2 | 2 | ||||
| Halictus ligatus/poeyi | 6 | 3 | 2 | 11 | ||
| Lassioglossum bruneri | 1 | 1 | ||||
| Lassioglossum coreopsis | 2 | 2 | 1 | 5 | ||
| Lassioglossum nelumbonis | 1 | 1 | ||||
| Lassioglossum pilosum | 1 | 1 | ||||
| Lassioglossum tegulare | 2 | 1 | 3 | |||
| Lassioglossum versatum | 13 | 13 | ||||
| Megachile brevis | 1 | 1 | 2 | |||
| Megachile mendica | 1 | 1 | ||||
| Melissodes desponsa | 2 | 2 | ||||
| Peponapis pruinosa | 1 | 1 | ||||
| Calliopsis andreniformis | 2 | 2 | ||||
| Grand Total | 13 | 10 | 1 | 30 | 12 | 66 |
This list of species is largely an expected one for an interior Maryland upland set of fields. The Lasioglossum nelumbonis is an uncommonly encountered species and is thought to be associated with water lilies. Since this particular site is located next to a pond containing water lilies this would be in keeping. It does seem odd that this site only had this one species present, and one specimen at that, but it may be a reflection of its isolation from other fields, being surrounded by extensive woodlands. The remaining species are all regionally occurring species and together the 18 species makes for a reasonable species total. Overall a solid list, but nothing in particular stands out about this list of bees.
Because we have sampled at Patuxent for so many years, we have accumulated a long list of species as well as a number of state records and rare species. Such species are not found in the surrounding suburban communities, where we have also been sampling. So it is interesting to see that doing 5 fields for one day on the refuge, while demonstrating that bees are present and the list substantial, we found only a fraction of all the species we know to be present and none of the very rare ones. A more complete and extensive survey would be needed to do that.
Lasioglossum nelumbonis - Photo by John Pascarella
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