Summary[edit] Description: Zelia vertebrata. Rock Creek Park, Washington, DC, USA. Date: 19 September 2015, 14:48. Source: Tachinid Fly. Author: Katja Schulz from Washington, D. C., USA. Camera location38° 58′ 33.54″ N, 77° 02′ 55.96″ WView all coordinates using: OpenStreetMap 38.975983; -77.048878.