Basic. Four primary types of aquatic insects form the foundation of a trout’s diet: mayflies, stoneflies, caddisflies, and midges. Learning how to identify each category of bugs will help you ...

Instead of looking for adult mayflies, researchers were searching for aquatic immature mayflies, known as nymphs, and used nets to scoop sand from the riverbed, the study said. The method worked.

“Given their incredible abundance, mayflies are key members of local food webs.” Instead of looking for adult mayflies, researchers were searching for aquatic immature mayflies, known as nymphs, and ...