Picture small dagger fly, made with magnification 8 and f/11 using a Canon 7D, a Canon MP-E 65mm/2.8 and a Canon 2x teleconverter. The picture is a single picture, made without a tripod in our garden while the fly was going its own business.
Empididae is a family of flies with over 3,000 described species occurring worldwide in all the Ecozones but the majority are found in the Holarctic. They are mainly predatory flies like most of their relatives in the Empidoidea, and exhibit a wide range of forms but are generally small to medium sized, non-metallic and rather bristly.
Common names for members of this family are dagger flies (referring to the sharp piercing mouthparts of some species) and balloon flies. The term "dance flies" is sometimes used for this family too, but the dance flies proper, formerly included herein, are now considered a separate family Hybotidae (source: Wikipedia)