Scientists scooped sand from a riverbed in Thailand and found two nymphs of rare mayfly species not seen in 22 years, a study said. Photo from Kwanboon and Boonsoong (2025) Knee-deep in a river of ...

Table 1 summarises the evidence gaps and ongoing studies that might address them. Information about evidence status is derived from the external assessment report. More information on the studies in ...

“For smallmouth, I’m looking for a mayfly hatch," says Nowak. "The immediate post-spawn typically coincides with a mayfly hatch. So you can just throw a topwater around and get fish to come up ...