Note: At the 2009 IABPA meeting in Portland, OR, USA, the IABPA membership voted to adopt the SWGSTAIN recommended terminology.
Definition
- Fly Spot
- [An artefact of fly activity similar in size and shape to medium or high velocity impact spatter.]*

Bloodstain Example - Fly Spot
Image courtesy of Detective C. Orme, York Regional Police
Description
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 & Gardner | May be confused with Spatter Family - Non-linear - Impact Spatter |
James, Kish & Sutton | Altered - Insects |
Wonder | Not a pattern. |
SWGSTAIN | Insect Stain - A bloodstain resulting from insect activity. |
* This definition is not from the IABPA terminology list. IABPA does not currently provide an official definition.