Stages of Decomposition
Other Stages
Misc.
Misc.
100
Begins at death and flies begin to arrive
What is fresh (1st stage)
100
First stage of a fly's life cycle.
What is the egg.
100
Does weather have an effect on insect evidence at a crime scene?
Yes, it slows it.
100
What is the type of animal that is often used to simulate human body in forensic entomological experiments?
What is a pig.
200
Body becomes inflated due to the production of gases from bacteria
What is the bloated stage (2nd)
200
The larval stage of a fly.
What is the maggot.
200
How long does it take for blowflies to arrive at a victim's remains?
Seconds
200
What is the time between the death and the discovery of a victim’s remains?
What is postmortem interval.
300
Gases subside, bacteria and maggots break through skin and corpse reduces to about 20% of it's original mass
What is the decay stage (3rd)
300
The shredding of an exoskeleton that occurs as a larva or adult insect grows.
What is molting.
300
The area between a victim's remains and the ground.
What is interface.
300
What is diptera?
Order of animals form Linnaeus’ Taxonomy that includes flies
400
Carcass is reduced to hair, skin, and bones
What is post-decay
400
How many days does it take from adult fly laying eggs for the full "cycle of life" of a blowfly?
What is 14-16 days.
400
DOUBLE JEOPARDY!!! What are the steps that forensic entomologists use when estimating the PMI in the correct order? (4 steps)
1. Collect maggots from the body along with other insect evidence 2. Identify the species of each insect species present 3. Determine the length of the maggots and use weather data to estimate the ages of the maggots 4. Use the insect evidence along with other factors to estimate the length of time that has passed since death
400
Where will females flies lay their eggs?
Near body openings (orifices) or wounds and trauma
500
This stage does not always occur. Only bone and hair remain.
What is the dry (skeletal) stage.
500
What type of metamorphosis has four stages.
What is complete.
500
DOUBLE JEOPARDY!!! Identify the stages of the life cycle of the blowfly in correct order starting with the adult fly.
What is adult, egg, 1st instar larva, 2nd instar larva, 3rd instar larva, pupa.
500
What are an entomologist’s duties? (name 3)
1. Identification of insects at various stages of their life cycle 2. Collection of insects as evidence 3. Preservation of insects as evidence 4. Determining PMI using insect evidence 5. Testifying as an Expert Witness in a trial
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