Question

Forensic entomologists use their knowledge of insects and and their life cycles and behaviors to give them clues about a crime. Most insects used in forensic investigations are in two major orders: Diptera (flies) and Coleoptera (beetles).

Species succession may provide clues for investigators. Some insect species may feed on a fresh corpse, while another species may prefer to feed on one that has been dead for two weeks. Other insect species that prey on the insects feeding on the corpse may also be found.

Weather data is also an important tool in analyzing insect evidence from a corpse. Investigators will make note of the temperature of the air, ground surface, the interface area between the body and the ground, and the soil under the body as well as the temperature inside any maggot masses. They will also collect weather data related to daily temperature (highs/lows) and precipitation for a period of time before the body was discovered to the day the insect evidence was collected.


1. List four factors that can affect insect evidence.

Answer 1

1. Time since death
2. Weather conditions (temperature, humidity, precipitation)
3. Availability of food sources
4. Presence of other insects and predators.

Step-by-step explanation:

Factors

1. Time since death: The length of time since death is an important factor that can affect insect evidence. Different insects have different life cycles and feed at different times during a decomposition process. Some insects may feed on a fresh corpse, while others may prefer to feed on one that has been dead for a certain amount of time. Knowing the time since death can provide investigators with a timeline of events and help them determine the progression of decomposition.
2. Weather conditions: Weather conditions such as temperature, humidity, and precipitation can greatly impact the presence and behavior of insects. High temperatures can speed up the rate of decomposition, while low temperatures can slow it down. Humidity can also play a role in the rate of decomposition, as well as the presence of certain insect species. Precipitation can also affect the behavior of insects, as well as the preservation of the body.
3. Availability of food sources: The availability of food sources can also impact the presence and behavior of insects. If there is a limited food source, insects may move to another area in search of sustenance. If the food source is abundant, insects may flock to the area and reproduce, leading to an increase in the population of insects at the site.
4. Presence of other insects and predators: The presence of other insects and predators can impact the evidence left by insects on a corpse. Some insects may be preyed upon by other insects, leading to a decrease in the population of certain species. The presence of predators can also alter the behavior of insects and affect the evidence left behind.