Once you have a good handle on the Home keys, you can start expanding to the other keys on the keyboard. Use the same repetition exercises to memorize the locations of the other keys. Use the nearest finger to reach the key. If you are keeping your wrists elevated, you will be able to easily strike the keys that are slightly outside of your reach. 6
Image credit Life Cycle of Aquatic Insects, USEPA. Gilbert Rowley illustrates the mayfly life cycle from the egg to the nymph and through the various adult stages (emerger, dun and spinner) that are of interest to flyfishers.
Kirk is a Most Viewed Writer in. Insects. Mayflies are simply intolerant to pollutants and to high turbidity (cloudiness of water due to suspended particles). Once chemical pollutants are added to the water, the mayfly larvae (nymphs) begin to fail to thrive or are directly killed by the toxins...and disappear. If they are present in good numbers, it is an indication that the waterway has been in pretty good shape for some time (months to years).