Earlier quoted context omitted.
Yes, of course. Your tone has to convey not only, "I am not a predator" but also "I do not perceive you as a threat, and so the purpose of my vocalization is not to scare you away because I perceive you as a threat, and if you come close I am likely to try to harm you in order to defend myself." In nature, the Bayesian prior on an entity that is not a member of your species, or even your tribe, seeking an interaction…
Hummingbirds I've noticed are very curious about other creatures. To a fault even, mantises will sometimes exploit this to catch hummingbirds (they are much more powerful than you might expect). I don't know if this is universal across hummingbird species/groups, but I'm able get very close to them by just patiently standing still by the feeder for 10 or 15 minutes, and they'll start investigating me.
They would flit past your head when you went out to refill them, but they seldom went more than a few feet away. You could stand under under the feeders and after a few minutes, if you were calm enough, they would start be willing to land on you and rest, or lick off any syrup you had gotten on your hands.