Final Note:
one of the fine opportunities to gather data is when Dad brings chicks. The chicks are not, of course, tame. But they faithfully follow Dad. And Dad is tame.
And it's flat-out hilarious watching the chicks at such a time: they want to flee the fearful thing -- me -- but Dad isn't fleeing , so . . . okay! This allows us to get quite close to truly wild emus (chicks) in order to observe them.
The same thing happens at times if wild birds and my birds and I are all present somewhere. The wild birds 'take their cue' from my birds. The result is that, very occasionally, I get to quite literally be present at/in emu behaviour involving interactions between my birds and wild birds.
[On one famous occasion, I was quietly observing two (of my) emus when they decided to attack each other. Once they lock eyes and begin advancing, all the world (including fences, lol . . . ) becomes irrelevant. Through the binoculars, just for three or four seconds, I was on the pointy end of a dinosaur attack. Splendid!]