The Giant Mayfly is a subspecies of Mayfly, common in the Eastern United States. This insect is mostly common in the summer months. It is one of the largest types of Mayfly you will ever see. They lay their eggs in the water.
Snipping Tool can be used only as a screen shot, or snip, of any object you see on your screen. So, snipping tool cannot scroll. You might have to scroll down the screen and then use the tool.
In Windows Vista (except in Home Basic), there is a tool called the Snipping Tool. To open it, click on the Start menu, type snip, then press Enter on your keyboard (the latest version of Windows Vista updates the search results as you type each letter).