The DC Butterfly Count was held on Wednesday, July 31 (rescheduled due to rain from July 29), and turned up an excellent diversity and number of species in a less-than-ideal butterfly season.
Areas surveyed: National Arboretum, National Zoo, Kenilworth Aquatic Gardens, Chain Bridge Flats, Tidal Basin Annual Flower Garden, two Flower Beds/Athletic Field between Maine Ave and Raoul Wallenberg Place, Mary Livingston Ripley Garden (east side of Arts and Industries Building), Victory Garden (across from Air and Space Museum), Bartholdi Park (US Botanical), two residential gardens in Upper Northwest.
- Pipevine Swallowtail—1
- Zebra Swallowtail—3
- E. Tiger Swallowtail—29
- Cabbage White—107
- Clouded Sulphur—1
- Orange Sulphur—10
- Gray Hairstreak—1
- Eastern-tailed Blue—11
- Variegated Fritillary—2
- Great Spangled Fritillary—11
- Pearl Crescent—1
- Question Mark—1
- Eastern Comma—1
- Mourning Cloak—1
- American Lady—7
- Painted Lady—9
- Red Admiral—44
- Red-spotted Purple—5
- Viceroy—1
- Northern Pearly Eye—1
- Appalachian Brown—1
- Monarch—37
- Silver-spotted Skipper—105
- Horace's Duskywing—31
- Wild Indigo Duskywing—1
- Common Sootywing—1
- Least Skipper—29
- Peck's Skipper—7
- Sachem—41
- Zabulon Skipper—1
Species: 30
Individuals: 493
