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DC and Maryland County and City Bee Records - 2011 Report

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  • Sam Droege
    All Attached is a spreadsheet with a list of bees for Maryland by County, City of Baltimore, Combined Baltimore City and County, and the District of Columbia.
    Message 1 of 1 , Jan 21, 2012

    Attached is a spreadsheet with a list of bees for Maryland by County, City of Baltimore, Combined Baltimore City and County, and the District of Columbia.  Most of the records here are of specimens that I have personally seen (outside of records vetted by John Ascher), over time I will add information about records from additional outside sources , but at this point I feel most comfortable primarily including records of specimens I have directly vetted.  

    In the attached file a red  "x" indicates a record that was added in 2011.  This does not necessarily mean that the specimen was collected in 2011 just that it was added to the records in 2011.
    The sightings tab in the file give the details for each of these new records.

    There are now 1945 verified county records for 355 species or species groups for the state.  Ultimately, given species found in surrounding states,  this list will surely go over 400, but again this is a conservative exercise and only the second year that records have been compiled.  

    Species Seen in One County or Equivalent = 81
    Two Counties = 58
    Three Counties = 43
    Four Counties = 33
    Five Counties = 26

    Species Seen in All Counties = 0

    Augochlorella aurata has been seen in 24 but not in Frederick and Allegany.
    Ceratina calcarata has been seen in 23 but not in Harold, Cecil, and Kent

    Using the SPECRICH online species richness estimator program

    We can use the above pattern to calculate the expected number of species to be found in the state given the pattern of 1's etc.

    Here are those results.

    An ultimate list of 436 species in Maryland is not an unreasonable thing.  We will see how close we come over the next few years.

    Below is a little table of the total number of species recorded for each county and how many of them were added in 2011

    Note that thanks to a suggestion by several people I have started to break out Baltimore City from Baltimore County since they are separate political entities (just to be fair).  That process is incomplete and I will work on this during the coming year to recreate those records.

    Note that there are some woefully undercovered counties....quite a number of them with fewer than 20 species.  It is interesting that one of the most developed counties (Prince George's) has the highest total bee species (I wonder who lives in that county?)

    If you live in one of the weak counties feel free to contact me and I will send you a set of glycol traps with can be run all year...you just have to dump the contents into alcohol or glycol and I will pick them up or you can mail them in become famous ....(sdroege@...).

    In 2011 a number of interesting records were added.  

    Andrena alleghaniensis - Added this year in PG county.
    Bombus variabilis - 1977 specimen from Baltimore County added from the Towson University Collection
    Colletes aestevalis - 1972 specimen from Plummer's Island from the Smithsonian Natural History Museum
    Lasioglossum apocyni - 2011 specimen collected from Davidsonville Ball Park (very sandy) in Anne Arundel County
    Lasioglossum floridanum - 2009 specimen collected by Jen Frye during her  Eastern Shore Interior Dune Project in Worcester County
    Lasioglossum rufitarsi - 2004 specimen collected near Redhouse in Garrett County
    Osmia chalybea - 2011 specimens collected on the Isle of Wight in Worcester
    Protandrena abdominalis - 1902 specimen collected in Indian Head by J.C. Bridwell from the University of Kansas Entomological Collection (Note, this is an interesting species that seems to have disappeared from the fauna of Eastern North America....I don't recall any recent records East of the Mississippi River ... likely  I will be proven wrong though)
    Bombus sandersoni - 2011 specimens from Garrett and Allegany counties from Dan Fiscus' study of Black Cohosh pollinators
    Hylaeus saniculae - 1923 specimen from Cabin John collected by J.R. Malloch from the Smithsonian
    Hylaeus saniculae - 1918 specimen collected by W.L. McAtee near Laurel from the Smithsonian
    Hylaeus sparsus - 1985 specimen collected by R. McGinley on Plummer's Island from the Smithsonian
    Pseudoanthidium nanum - 2011 specimen of this recent invasive from Europe from Washington County at a Car Dealership
    Habropoda laboriosa - 2010 specimen (male) from Flintstone collected during a state survey.  This record appears to be a significant western extension of this blueberry specialist.  While certainly possible, it seems a bit suspicious so hopefully additional records will arrive, note that is was a male and could have been a dispersing individual.

    I have to thank a number of people for helping collect new records.  Gaye Williams for access to the state's Department of Agriculture specimens, Jane Whitaker for indefatigable collections throughout the state and D.C., Richard Orr in Howard and elsewhere, Gene Scarpulla for his interesting work on Hart-Miller Island, Thomas of Baltimore for his work finding bees and other insects in the interior of Baltimore City,  Assateague Island National Seashore for their surveys, Carl White for catching bees at his home and his father's business, Dan Fiscus for showing me his bees from Cohosh in Western Maryland, Jason Martin for all his expeditions to various parts of the state to collect bees, John LaPolla for access to the Towson Collection, Gary Hevel for access to his fantastic backyard arthropod collection, USDA ARS microhymenopterististas for passing on their bycatch, John Ascher for his great database of AMNH bees and his identification marksmanship, Margaret Pennock and Dave Wood for harnessing the students of Sidwell Friends to collect bees

    Feel free to distribute....
    Additional specimens, photos, and bee records always welcome!


    Sam Droege  sdroege@...                      
    w 301-497-5840 h 301-390-7759 fax 301-497-5624
    USGS Patuxent Wildlife Research Center
    BARC-EAST, BLDG 308, RM 124 10300 Balt. Ave., Beltsville, MD  20705

    "...and though the holes were rather small, they had to count them all..."

    A day in the life.
    Sargent Peppers

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