Washington, D. C.

• Rock Creek Park Jan 2005
• Rock Creek Park, Klingle Valley Jan 2006
• Roosevelt Island, Potomac Gorge Dec 2005
• Washington, D. C. Area Jan 2005, March 2005
• Trees of Washington D. C. Capitol Area Oct 2006

• Potomac Gorge Bio-Blitz http://www.nature.org/wherewework/northamerica/states/maryland/news/news1981.html
  
• Rock Creek Park http://www.nps.gov/rocr/ Rock Creek Park is truly a gem in our nation’s capital. It offers visitors an opportunity to reflect and soothe their spirits through the beauty of nature. Fresh air, majestic trees, wild animals, and the ebb and flow of Rock Creek emanate the delicate aura of the forest.
• The mission of Casey Trees is to restore, enhance, and protect the tree canopy of the Nation's Capital. Our unique interactive Tree Map provides detailed information on any street tree in DC.   http://www.caseytrees.org/ 
• http://www.findarticles.com/p/articles/mi_m1016/is_1_107/ai_78399971