[vimeo]http://vimeo.com/63850703[/vimeo] PA Undercurrent Outfitters serves up this sweet fly fishing footage of early season baetis hatches on some of my favorite waters in Central Pennsylvania. Baetis, Blue-Winged Olives or just BWO? As the film producers note, “whatever you call them, its more than likely they’re the first mayfly to hatch in your area. Less colorful…