What color are blow flies typically described as?

Blow flies are typically described as solid metallic green, bronze, blue, or black due to their distinctive and shiny exoskeletons. This metallic coloration is a key identifying feature of this family of flies, which are known for their iridescent appearance. They play a significant role in decomposition and are often found near decaying organic matter, which makes their coloration an aspect of interest in ecological studies. The vibrant colors help distinguish them from other types of flies and are an important characteristic in entomology and pest management practices.

The other options, such as dull grey or bright yellow, do not accurately reflect the appearance of blow flies, which would aid in incorrect identification if relied upon. Radiant red is also not characteristic of blow flies, as this color does not correspond to any known species within this group.