Trending: Forktail Damselflies Introduced at Mountain Lake (San Francisco Chronicle - October 15, 2016) Wednesday, Nov 02, 2016 Category Nature and Science Share facebook twitter email ADD TO iCal Google Calendar Page ContentIn late September, rare forktail damselflies were introduced at the Presidio's Mountain Lake. David Perlman from the San Francisco Chronicle got the scoop from Presidio Trust wildlife ecologist Jonathan Young.Read the San Francisco Chronicle's article about forktail damselflies at Mountain Lake >>