I'm suprised this hasn't made it here yet - FCPD released a news release yesterday warning Centreville residents of an escaped Emu:
http://www.fairfaxcounty.gov/police/reports/Reports%202006/092006animemu.htm
Emu on the Loose in the Centreville Area
On Monday, September 18 at about 3 p.m., three emus escaped from a farm located near the 15000 block of Braddock Road. One emu found its way home while Animal Control captured a second in the 5300 block of Chandley Farm Circle. The third emu is still on the loose. The last sighting was at 8:30 a.m. today, near Kamputa Drive and Sully Park Drive.
Citizens are urged to pay close attention when driving near that area. The emu will most likely stay off the highway unless scared or cornered.
Anyone with information about the location of the emu is asked to call the Animal Shelter at 703-830-1100 or police non-emergency number at 703-691-2131.