mayfly-amimekagerou · Mayfly on my keyboard. Mayflys are aquatic insects where the immature stage occurs in fresh water (called naiads). The adults are short-lived, maybe as little as a few hours to a day or two, depending on the species. · Original Date 2005.08.15 22:29:16 · Model C770UZ · Focal Length 24.8 mm · Metering Mode Multi-segment · ISO Equivalent 108 · Exposure Time 1/30s · Aperture 3.2 · Exposure Bias Value 0 EV · Exposure Program Program creative (slow program) · White Balance Auto white balance · Flash No · Resolution 1024 x 766