|View from Hill, Charles River Peninsula, Needham, MA|
The March fly is a species of bibionidae (I don't know if these are "lovebugs" or not, but that's what they are doing--mating). If you let them they will crawl all over you. Here's a close up of a female (the males look quite different).
The blue-gills are making nests of small stones at the canoe launch.
And if you stand on the small bridge at the start of the trail you may see barn swallows circling a small pool in the swampy area to the right.