Tachinid Recording Scheme

... it's a bristle thing

Is it a tachinid?

What is a tachinid ... how do I know for sure that I am looking at one? 

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith