Bloodstain Pattern Analysis Terminology

Note: At the 2009 IABPA meeting in Portland, OR, USA, the IABPA membership voted to adopt the SWGSTAIN recommended terminology.


Fly Spot
[An artefact of fly activity similar in size and shape to medium or high velocity impact spatter.]*
Bloodstain Example - Fly Spot
Bloodstain Example - Fly Spot


Fly activity at the crime scene may result in bloodstains which look a lot like impact spatter. This may be caused by flies tracking or regurgitating blood.

Alternate Terminology

Bevel & GardnerMay be confused with Spatter Family - Non-linear - Impact Spatter
James, Kish & SuttonAltered - Insects
WonderNot a pattern.
SWGSTAINInsect Stain - A bloodstain resulting from insect activity.
* This definition is not from the IABPA terminology list. IABPA does not currently provide an official definition.