Forensic Entomology. Maggots and Time of Death Estimation. Entomology is the Study of Insects Images from: www.afpmb.org/military_ entomology /usarmyento/files/Army Entomology .ppt . Insect Biology. Insects are the most diverse and abundant forms of life on earth.
Maggots and Time of Death Estimation
Images from: www.afpmb.org/military_entomology/usarmyento/files/ArmyEntomology.ppt
Temperature Stiffness Time of death
Warm Not stiff Dead less
than three hours
Warm Stiff Dead between 3
to 8 hours
Cold Stiff Dead between 8
to 36 hours
Cold Not stiff Dead in more
than 36 hours
Bacteria and maggots break through the skin.
Large maggot masses and extreme amounts of fluid.
Larvae beginning to pupate.
Corpse reduced to about 20% of it’s original mass.Decay
Spiracles are incomplete
Spiracles are complete
The fluctuation in ambient temperature induced elevated maggot activity which is consistent with other similar experiments.Temperature is a Factor: Pig 1
The temperatures for Pig 1 fluctuated more than those of Pig 2.Temperature is a Factor: Pig 2
The maggots feed and grow to a certain point when they begin to leave the carcass to find a safe place to pupate.PhormiaAverage Maggot Length vs. Time
This is why we believe there are two peaks in our graph data for the Sunlit Pig.
The photograph was taken at a time consistent with the influx at 132 hours.Two Different Maggot Generations