Mayfly Nymph Close-Up | Insect Biology and Aquatic Ecology #2172973 (License: Personal Use)

The image shows a mayfly nymph (order Ephemeroptera), characterized by its elongated black-and-orange segmented abdomen, prominent antennae, and three long caudal filaments. Its thoracic legs are adapted for clinging to submerged substrates, and feathery gills along the abdomen aid respiration in oxygen-rich waters. These insects serve as bioindicators due to their sensitivity to pollution.

Used in educational, entomological, and environmental science contexts-especially in freshwater ecology guides, biodiversity reports, or citizen science platforms-to illustrate aquatic macroinvertebrates and water quality assessment.