Calliphoridays

A roadmap for bridging basic and applied research in forensic entomology.

Annual Review of Entomology, 56, 401–421.

Outlines core theoretical and methodological frameworks underpinning the discipline, including the ADD-based PMI model, succession ecology, and the role of carrion insect colonization dynamics. Provides the conceptual scaffolding for integrating laboratory thermal data with scene-based PMI estimation. Foundational reference for the accumulated degree day framework used throughout this tool.

Entomology-based methods for estimation of postmortem interval.

Research and Reports in Forensic Medical Science, 6, 1–16.

Systematic review of PMI estimation methods in forensic entomology, covering ADD, ADH, isomegalen diagrams, Ikemoto-Takai development rate models, and predictive modelling. Critically evaluates reliability, sources of error (microclimate variation, preservation artifacts, colonization delay), and best practices for uncertainty quantification. Directly informed the multi-method comparison approach implemented in this tool.

Forensic entomology: Concepts, procedures and limitations — a review.

Insects, 14(6), 536.

Contemporary review of forensic entomology concepts and procedures with emphasis on limitations, standardization challenges, and quality assurance. Addresses temperature data acquisition, species identification, and proper interpretation of entomological evidence. Informed the quality scoring system and disclaimer language in this tool.

It is all about the insects: a retrospective on 20 years of forensic entomology highlights the need for improved data sharing and interoperability.

International Journal of Legal Medicine, 135(5), 2031–2038.

Retrospective analysis of 949 insect-based forensic cases from 2001–2019. Over 80% of cases with available PMI information involved presumed PMIs of 1–21 days, the window in which entomological evidence provides day-specific PMI_min estimates. Demonstrates the practical utility of blow fly development-based PMI calculations in real casework and underscores the importance of standardized reporting.

A new linearized formula for the law of total effective temperature and the evaluation of line-fitting methods with both variables subject to error.

Environmental Entomology, 29(4), 671–682.

Introduces the linearized development rate model DT = a + bT (where D = development time, T = temperature), which avoids bias introduced by reciprocal transformation in classical degree-day models. The Ikemoto-Takai model is implemented as Method 7 (calcDevelopmentRate) in this tool, providing a nonlinear correction to standard ADD estimates that is particularly important at temperatures near the base developmental threshold.

Minimum and maximum development rates of some forensically important Calliphoridae (Diptera).

Journal of Forensic Sciences, 45(4), 824–832.

Presents optimistic (minimum development time) and conservative (maximum development time) thermal development rates for five forensically important North American blow fly species at crime-scene-comparable temperatures: Phormia regina, Phaenicia (Lucilia) sericata, Eucalliphora latifrons, Lucilia illustris, and Calliphora sp. The dual min/max framework is the basis for the ADD Optimistic and ADD Conservative methods in this tool. Base temperature and ADD threshold data for Lucilia sericata (base: 2°C) and Phormia regina (base: 3.5°C) are directly derived from this work.

Larval growth rates of the blowfly, Calliphora vicina, over a range of temperatures.

Medical and Veterinary Entomology, 20(1), 106–114.

Measured larval growth rates of Calliphora vicina at 4–30°C under controlled laboratory conditions using wild-trapped fly colonies. Larval length was validated as a reliable "biological clock" for PMI estimation. Provides the core developmental threshold (base: 3°C, ADD_{3rd instar}: ~222 ADD) and isomegalen length-stage relationships for C. vicina that are implemented in this tool. This species is among the most important and well-studied European forensic blow flies.

Effect of temperature on Lucilia sericata (Diptera: Calliphoridae) development with special reference to the isomegalen- and isomorphen-diagram.

Forensic Science International, 120(1–2), 32–36.

Establishes complete temperature-dependent larval development curves for Lucilia sericata across 15–30°C, with detailed isomegalen diagrams mapping larval body length to accumulated thermal units. Introduced the isomegalen method as a forensic PMI estimation tool, enabling length-interpolated ADD estimates rather than relying solely on instar designation. The isomegalen method (Method 5) implemented in this tool is based on this framework.

Effects of temperature on Chrysomya rufifacies (Diptera: Calliphoridae) development.

Journal of Medical Entomology, 34(3), 353–358.

Documents complete larval and pupal development of the Hairy Maggot Blow Fly at cyclic temperatures of 15.6, 21.1, 26.7, and 35.0°C. Development ranged from 190–598 hours egg-to-adult. Establishes base developmental temperature and ADD thresholds for C. rufifacies (base: 10°C) and characterizes its strong preference for high temperatures (optimal: ~35°C). Direct source for C. rufifacies parameters in this tool's species database.

Effect of fluctuating temperatures on the development of a forensically important blow fly, Protophormia terraenovae (Robineau-Desvoidy) (Diptera: Calliphoridae).

Journal of Economic Entomology, 106(4), 1856–1862.

Examines how natural diurnal temperature fluctuations (vs. constant lab temperatures) affect Protophormia terraenovae development rates. Demonstrates that fluctuating temperatures produce development rates consistent with predictions from accumulated degree day models when mean temperature is equivalent, validating the ADD framework for field applications. Confirms ADD thresholds and base temperature parameters (base: 2°C) for this cold-tolerant northern species used in this tool.

A morphological and molecular comparison of British and German populations of Calliphora vicina (Diptera, Calliphoridae), including a preliminary examination of their developmental differences and its implications for forensic entomology.

PLOS ONE, 13(11), e0207188.

Demonstrates statistically significant developmental rate differences between British and German C. vicina populations at several temperatures, with some morphological divergence. Highlights that geographic population variation in development rates can introduce systematic errors into PMI estimates if laboratory reference data is from a different region than the casework. Informs the uncertainty margins applied in this tool's quality scoring system and Monte Carlo simulation.

Decomposed liver has a significantly negative effect on the development rate of the blow fly Calliphora vicina.

International Journal of Legal Medicine, 127(1), 259–262.

Shows that substrate type — specifically decomposed liver versus fresh tissue — significantly slows Calliphora vicina larval development, with implications for ADD-based PMI estimates at advanced decomposition stages. Highlights a known source of error when applying standard ADD thresholds (developed on fresh tissue) to advanced decomposition scenarios. Informs quality scoring deductions in this tool for late-stage specimens.

A preliminary study on the estimation of postmortem interval using isomegalen and thermal summation model of Aldrichina grahami (Aldrich) (Diptera: Calliphoridae).

Insects, 10(7), 184.

Applies both the isomegalen (larval length interpolation) and thermal summation methods to Aldrichina grahami, an important forensic blow fly in East and Southeast Asia. Validates the isomegalen approach as an effective complement to standard ADD estimation, particularly for specimens of known length. Direct source for A. grahami developmental parameters (base: 5°C) and length-development relationships in this tool.

Occurrences of flesh flies (Diptera, Sarcophagidae) on human cadavers in Switzerland, and their importance as forensic indicators.

Forensic Science International, 220(1–3), 158–163.

Provides ecological and behavioral data on Sarcophagidae occurrence on human cadavers in a European temperate context, including colonization timing and co-occurrence patterns with Calliphoridae. Characterizes the forensic significance of flesh flies — notably their viviparous larviposition habit, which means larval instars at discovery require different colonization timing assumptions than blow fly eggs. Informs colonization adjustment logic and the Sarcophagidae-specific PMI offset applied in this tool.

Comparison between entomological- and accumulated degree days-based methods for postmortem interval estimation: a case study.

Insects, 12(3), 264.

Compares ADD-based PMI calculations against full entomological succession-based estimates across real casework, evaluating when the two approaches converge or diverge and what factors drive discrepancies. Demonstrates that ADD methods provide robust PMI_min estimates when the oldest relevant insects are correctly identified and temperature records are accurate. Directly supports the multi-method comparison design in this tool.

Using estimated on-site ambient temperature has uncertain benefit when estimating postmortem interval using blow fly development.

Psyche: A Journal of Entomology, 2010, 610639.

Evaluates the impact of ambient temperature estimation accuracy on PMI calculations, comparing on-site maggot mass temperature measurement against nearest weather station data. Finds that errors in temperature data propagate directly and non-linearly into PMI estimates. Supports including temperature as a primary uncertainty dimension in the Monte Carlo simulation in this tool (temperature ±1°C perturbation) and underscores why the auto-fetch from historical weather data with manual override is essential.

Blowflies (Diptera: Calliphoridae) in forensic practice: a retrospective study of 160 cases from Central Europe.

International Journal of Legal Medicine, 136(3), 905–913.

Retrospective analysis of 160 forensic cases in Central Europe where blow fly evidence was used for PMI estimation. Documents which species were recovered (predominantly Calliphora vicina and Lucilia sericata), the distribution of cases across seasons and environments, and sources of disagreement between entomological and investigative PMI. Real-world validation of ADD-based methods at the scale of routine casework.