What could a bug as small as a speck of dust be?

Answer 1

A bug as small as a speck of dust could be a tiny insect like a mite or a miniature form of a larva. It might also be an early stage of a larger insect, such as a mosquito or a fruit fly, which starts off very small. Additionally, some microscopic organisms, like certain types of bacteria or protozoa, can also fall into this size range. Such tiny creatures often play crucial roles in ecosystems, including decomposition and nutrient cycling.