It is apparent when a mom with fledglings arrives. They drink together initially and she sets herself apart by vigorously challenging any other hummer that approaches while the youngsters drink.
The normal vocals, buzzing and diving from the three males who've staked out the feeders quiets for a short while.
It's as though the nectar feeders are momentarily off-limits, each of the males sitting motionless on their perches, accepting the family without interference. Eventually Mom buzzes the youngsters. Chirping, she fans her tail and hovers, as if to say, lets go. They circle for an instant, then off they fly into the higher canopy. Sigh.