
On some days these large flies out numbered the bees over the waning days of flowering. The droplets you see are nectar fallen from the many flowers above, unvisited by either Hummingbirds or Bats, both of which are heavy nectar feeders. Without their participation the nectar literally overflows. These larger pollinators have much higher energy demands and having evolved with the flowers, each has come to meet the needs of the other.