Soft tissue scavenging patterns of mice on human remains

Area of Science:

• Forensic Science
• Zoology
• Ecology

Background:

• Rodent scavenging of human remains is documented but often lacks detailed behavioral data.
• Existing literature primarily features single-case examples, limiting understanding of scavenger patterns in specific environments.
• Mouse scavenging data, in particular, often lacks sufficient sample size and full-duration activity representation.

Purpose of the Study:

• To investigate deer mouse scavenging behavior on human remains using a larger sample size.
• To document the progression and patterns of scavenging activity over the full duration.
• To compare observed deer mouse scavenging patterns with existing literature.

Main Methods:

• Utilized motion-activated game cameras and field photography at the Forensic Investigation Research Station.
• Documented scavenging progression and behavior of deer mice (Peromyscus maniculatus group) on 11 human donors.
• Collected data over the full duration of scavenging activity, noting seasonal patterns.

Main Results:

• Deer mice exhibited a preference for skin and fat, rarely consuming muscle to expose bone.
• Scavenging primarily occurred on the limbs, with hands, feet, and head generally ignored.
• Distinct trail patterns of tissue consumption were observed on limbs in some cases, with most activity beginning in spring.

Conclusions:

• This study significantly expands existing documentation on mouse scavenging of human remains.
• Observed deer mouse behavior differs from previous reports, particularly regarding preferred body areas.
• Detailed documentation of scavenger behavior, like that of deer mice, is vital for interpreting death scenes in forensic investigations.