Which family is associated with a metallic look on the thorax and abdomen?

• A. Scarabaeidae
• B. Calliphoridae
• C. Dermestidae
• D. Muscidae

Answer: (B)

Metallic coloration on the thorax and abdomen is a hallmark feature of blowflies in the Calliphoridae family. This bright metallic sheen—often green, blue, or coppery—results from microscopic structural scales on the exoskeleton that reflect light. Calliphoridae are among the first insects to colonize decomposing remains, so recognizing that metallic look helps identify them quickly in the field and is particularly useful for estimating postmortem interval. Common forensic species in this family include Lucilia sericata and Phormia regina. Other families may be duller or lack this distinctive metallic sheen, so the shiny appearance on the thorax and abdomen points to Calliphoridae.