Which fly is known for being the most common in the world?

The common house fly is recognized as the most prevalent fly species worldwide due to its adaptability and close association with human habitats. These flies thrive in diverse environments, particularly where there are organic materials that provide food sources, such as decaying food, garbage, and waste. Their ability to breed quickly and in large numbers further contributes to their ubiquitous presence in urban and rural areas alike.

In addition to their widespread occurrence, common house flies are significant from a public health perspective, as they can carry and transmit various pathogens, causing diseases in humans and animals. This adaptability and health impact solidify their status as the most common fly globally.

Other fly species mentioned, such as the flesh fly, phorid fly, and blow fly, have specific habitats or behaviors that do not equate to the widespread presence and adaptability of the common house fly. While they may be locally abundant or significant in particular contexts, they do not match the overarching prevalence of the common house fly across various regions of the world.