What species of fly is typically the first to feed on a dead carcass?

The blow fly is typically the first species to feed on a dead carcass due to its life cycle and behavior. Upon discovering a deceased animal, female blow flies are attracted to the odor of decay, which signals the presence of potential food and a suitable site for laying eggs. These flies are highly efficient decomposers and play a critical role in the ecosystem by accelerating the process of decomposition.

Their ability to find carrion quickly is attributed to their excellent sense of smell, allowing them to locate decomposing bodies from considerable distances. Blow flies usually arrive on a carcass within minutes of death, making them one of the first insects to colonize the body.

In contrast, while house flies, stable flies, and phorid flies may also feed on carcasses, they do not typically arrive as early as blow flies. House flies tend to focus more on refuse and less contaminated areas, stable flies prefer grazing animals and manure, and phorid flies are often associated with decaying plant matter rather than fresh carrion. Therefore, the blow fly's timely arrival and preference for carrion highlight its unique role in the decomposition process.