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Spatial patterning of vulture scavenged human remains
M Katherine Spradley1, Michelle D Hamilton, Alberto Giordano
1Department of Anthropology, Texas State University-San Marcos, San Marcos, TX 78666, United States. mks@txstate.edu
Forensic Science International
|December 30, 2011
Summary
Vulture scavenging significantly impacts human remains decomposition, rapidly skeletonizing a body in hours. This rapid decomposition can lead to inaccurate postmortem interval estimations in forensic investigations.
Area of Science:
- Forensic Anthropology
- Taphonomy
- Wildlife Scavenging
Background:
- Vulture scavenging is a critical factor in human decomposition.
- Understanding scavenging patterns is essential for accurate postmortem interval estimation.
- Previous research has not fully detailed vulture scavenging effects on human remains.
Purpose of the Study:
- To investigate the effects of vulture scavenging on human decomposition.
- To analyze the timing, sequence, and rate of skeletonization, disarticulation, and dispersal.
- To map skeletal element transport using GIS and GPS to understand dispersal patterns.
Main Methods:
- Placement of human remains at an outdoor decomposition facility (FARF).
- Observation via motion-sensing cameras and direct observation.
- Spatial analysis using Geographic Information Systems (GIS) and Global Positioning System (GPS).
Main Results:
- Initial vulture scavenging occurred 37 days after body placement, differing from prior studies.
- Complete skeletonization occurred within 5 hours of initial scavenging.
- Skeletal elements were dispersed to lower elevations, with early disarticulation and dispersal.
Conclusions:
- Vulture scavenging can drastically accelerate skeletonization, potentially leading to errors in postmortem interval estimations.
- Spatial analysis reveals terrain influences on skeletal element dispersal.
- Early disarticulation and dispersal are characteristic of vulture scavenging sequences.
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