No flocks for Tawny Grassbird (Megalurus timoriensis). Not usually seen on barbed wire: too busy in grass and low bushes sharing scolding calls with partner. Species always sounds disgruntled.
And Golden-headed Cisticola (Cisticola exilis) - sharing exactly the same habitat and conditions - usually sounds absolutely content. Interpreting bird sounds via human emotional responses is for the birds.
Finally, one for the birds in a strictly predatory sense, Australian Hobby (Falco longipennis). Smallest I've seen and presumably a male, bird seemed barely close to the 30cm of usual 30-35cm size range. But more than enough to scare most other birds in the area.
Click pix to enlarge