Local Pollinators of the

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Local Pollinators of the Washington, D.C.,
Area Edward M. Barrows Laboratory of
Entomology Biodiversity Georgetown University,
Washington, D.C. September 2004
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WDC Area
Montgomery Co., MD

Prince Georges Co., MD
WDC
Fairfax Co., VA
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Outline I. Kinds of Actual and Possible Animal
Pollinators II. Some Pollinator Places in the
WDC Area (public and private)
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Part I. Kinds of Animal Pollinators Possible
Pollinators Bees Beetles Butterflies Flies Moths
Thrips Wasps Some other arthropods Ruby-throated
Hummingbird
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Main Local Animal Pollinators Bees Flies
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Main Local Animal Pollinators Bees
(Apiformes) About 250 species in the WDC
Area. About 170 species in WDC. (5 taxonomic
families) (Database of John S. Ascher and Sam
Droege, 2004)
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Main Local Animal Pollinators Miner Bees
(Andrenidae) (about 45 species in WDC)
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Main Local Animal Pollinators
Andrena sp. (miner bee, 5 mm long, Andrenidae) on
Erica cv. (heather) (Maryland, March 2004)
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Main Local Animal Pollinators Apid Bees
(Apidae) (about 59 species in WDC)
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Main Local Animal Pollinators The Honey Bee
(Apidae)
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Main Local Animal Pollinators Bees
Apis mellifera (Honey Bee, 12 mm long, alien
species, Apidae) on Apocynum medium (Medium
Indian Hemp) (Maryland, July 2004)
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Main Local Animal Pollinators Bumble Bees
(Apidae) (about 10 species in the Area)
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Main Local Animal Pollinators Bees
Bombus fraternus (Fraternal Bumble Bee, 12 mm
long, Apidae) on Agastache rugosa (Korean
Hyssop) (Maryland, August 2003)
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Main Local Animal Pollinators Bees
Bombus fraternus (Fraternal Bumble Bee, 12 mm
long, Apidae) on Agastache rugosa (Korean
Hyssop) (Maryland, August 2003)
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Main Local Animal Pollinators Bees
Bombus vagans (Wandering Bumble Bee, 15 mm long,
Apidae) on Apocynum medium (Medium Indian Hemp)
(Maryland, June 2004)
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Main Local Animal Pollinators Bees
Bombus vagans (Wandering Bumble Bee, 15 mm long,
Apidae) on Helianthus annuus cultivar (Annual
Sunflower) (Maryland, August 2003)
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Main Local Animal Pollinators Bees
Bombus vagans (Wandering Bumble Bee, 15 mm long,
Apidae) on Helianthus annuus cultivar (Annual
Sunflower) (Maryland, August 2003)
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Main Local Animal Pollinators Bees
Bombus vagans (Wandering Bumble Bee, 15 mm long,
Apidae) on Helianthus annuus cultivar (Annual
Sunflower) (Maryland, August 2003)
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Main Local Animal Pollinators Carpenter Bees
(Apidae) (5 species in WDC)
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Main Local Animal Pollinators Bees
Ceratina sp. (little carpenter bee, Apidae) on
an asteriad (River Farm, Virginia, August 2004)
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Main Local Animal Pollinators Bees
Xylocopa virginica virginica (Large Carpenter
Bee, 22 mm long, Apidae) on Celosia cv.
(Cockscomb) (Virginia, August 2003)
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Main Local Animal Pollinators Plasterer Bees
Yellow-faced Bees (Colletidae) (about 7 species
in WDC)
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Main Local Animal Pollinators Bees
Hylaeus sp. (yellow-faced bee, 5 mm long,
Colletidae) on Erigeron annuus (Daisy Fleabane)
(Maryland, August 2004)
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Main Local Animal Pollinators Bees
Colletes thoracicus (Polyester Bee, 12 mm long,
Colletidae) on Taraxicum officinale (Common
Dandelion) (New Jersey, May 2003)
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Main Local Animal Pollinators Sweat Bees
(Halictidae) (about 37 species in WDC)
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Main Local Animal Pollinators Bees
Agapostemon virescens (sweat bee, Halictidae) on
Oenothera fruticosa (Sundrops) (Maryland, June
2004)
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Main Local Animal Pollinators Bees
Agapostemon virescens (sweat bee, Halictidae) on
Oenothera fruticosa (Sundrops) (Maryland, June
2004)
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Main Local Animal Pollinators Bees
Agapostemon virescens (sweat bee, Halictidae) on
Oenothera fruticosa (Sundrops) (Maryland, June
2004)
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Main Local Animal Pollinators Bees
Lasioglossum coeruleum (Blue Sweat Bee, 4 mm
long, Halictidae) on Apocynum medium (Medium
Indian Hemp) (Maryland, July 2004)
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Main Local Animal Pollinators Bees
Lasioglossum sp. (sweat bee, Halictidae) on
Cirsium vulgare (Bull Thistle, alien species)
(Maryland, August 2004)
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Main Local Animal Pollinators Bees
Lasioglossum imitatum (Imitating Sweat Bee, 3 mm
long, Halictidae) on Lagerstroemea cv. (crape
myrtle, alien species) (Maryland, July 2001)
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Main Local Animal Pollinators Bees
Lasioglossum sp. (sweat bee, 5 mm long,
Halictidae) on Potentilla recta (Rough-fruited
Cinquefoil, alien species) (Michigan, June 2004)
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Main Local Animal Pollinators Bees
Augochloropsis metallica (Metallic Gold-green
Sweat Bee, 5 mm long, Halictidae) on Apocynum
medium (Medium Indian Hemp) (Maryland, July 2004)
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Main Local Animal Pollinators Leaf-cutter Bees
(Megachilidae) (about 25 species in WDC)
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Main Local Animal Pollinators Bees
Megachile sp. (leaf-cutter bee, 6 mm long,
Megachilidae) on Verbesina alternifolia
(Wingstem) (Maryland, August 2001)
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Main Local Animal Pollinators Bees
Megachile sculpturalis (Giant Resin Bee, 15 mm
long, alien species, Megachilidae) on Asclepias
syriaca (Common Milkweed) (Maryland, June 2002)
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Main Local Animal Pollinators Flower-visiting
flies (about 155 species in the WDC Area) (7
taxonomic families)
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Main Local Animal Pollinators Flower Flies
(Syrphidae) (about 100 species in the WDC Area)
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Main Local Animal Pollinators Flies
Toxomerus sp. (flower flies, 5 mm long,
Syrphidae) on Gaillardia pulchella (Blanket
Flower) (Washington, D.C., July 2001, photo by
Daniel S. Kjar) and Aster umbellatus (Flat-top
White Aster) (Maryland, September 2004)
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Main Local Animal Pollinators Flies
Sphaerophoria contigua (Contiguous Flower Fly, 5
mm long, Syrphidae) on Clematis terniflora
(Asian Clematis) (Virginia, August 2003) and on
Paeonea cv. (peony) (Maryland, May 2001)
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Main Local Animal Pollinators Flies
Temnostoma longicornis (Longhorn Flower Fly, 12
mm long, Syrphidae) on Clethra alnifolia (Sweet
Pepperbush) (Washington, D.C., July 2001)
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Main Local Animal Pollinators Flies
Temnostoma longicornis (Longhorn Flower Fly, 12
mm long, Syrphidae) on Aster umbellatus
(Flat-top White Aster) (Maryland, September 2004)
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Main Local Animal Pollinators Flies
Tropidia albistylum (flower fly, 7 mm long,
Syrphidae) on Aster umbellatus (Flat-top White
Aster) (Maryland, September 2004)
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Main Local Animal Pollinators Flies
Eristalis dimidiatus (flower fly, 7 mm long,
Syrphidae) on Aster umbellatus (Flat-top White
Aster) (Maryland, September 2004)
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Main Local Animal Pollinators Flies
Eupeodes americana (American Flower Fly, 6 mm
long, Syrphidae) on Solidago ulmifolia (Elmleaf
Goldenrod) (Maryland, September 2004)
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Main Local Animal Pollinators Flies
Eristalis arbustorum (Orchard Flower Fly, 10 mm
long, Syrphidae) on Chrysanthemum leucanthemum
(Ox-eye Daisy (Michigan, June 2004, known from
WCD as well)
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Main Local Animal Pollinators Flies
Eristalis transversa (Transverse Flower Fly, 11
mm long, Syrphidae) on Helenium autumnale
(Common Sneezeweed) (Maryland, August 2001)
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Main Local Animal Pollinators Bee Flies
(Bombyliidae) (about 10 species in the WDC Area)
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Main Local Animal Pollinators Flies
Bombylius major (Major Bee Fly, 15 mm long,
Bombyliidae) (Maryland, April 2001)
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Main Local Animal Pollinators Bot Flies
(Calliphoridae) (about 5 species in the WDC Area)
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Main Local Animal Pollinators Flies
Calliphora sp. (bot fly, 7 mm long,
Calliphoridae) on Euonymous fortunei (Euonymous,
alien) (Maryland, August 2003)
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Main Local Animal Pollinators Flies
Calliphora sp. (bot fly, 7 mm long,
Calliphoridae) on Solidago ulmifolia (Elmleaf
Goldenrod) (Maryland, September 2003)
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Main Local Animal Pollinators Tachina Flies
(Tachinidae) (about 10 species in the WDC Area)
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Main Local Animal Pollinators Flies
Tachinid fly (8 mm long, Tachinidae) on Mentha
spicata (Spearmint) (Washington, D.C., July 2004)
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Main Local Animal Pollinators Flies Mosquitoes
(Culicidae) (about 30 species in the WDC Area)
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Main Local Animal Pollinators Flies
Aedes albopictus (Asian Tiger Mosquito, 2 mm
long, Culicidae) on Aster umbellatus (Flat-top
White Aster) (Maryland, September 2004) A
pollinator?
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