Biting midges, or no-see-um bugs, are shorter than 1/8 inches long when fully grown as an adult, while no-see-um larvae are between 2 and 5 millimeters long. The eggs laid by no-see-um bugs are banana or cigar shaped, white in color and approximately 1/4 millimeter in length.
With more than 4,000 species, no-see-um bugs are found all over the world, with some species being found in sub-tropics, tropical regions and the Caribbean. No-see-um bugs are most prevalent in salt marsh habitats, and they do not occupy homes or other structures with people living in them. These bugs regularly bite people and often leave behind painful and irritating marks, with some bites causing long-lasting lesions.