My suspicions appear to be confirmed ... the blackbirds have two sets of babies per season. For the first time since living here, they've made a nest in the fig tree!
I don't hear babies chirping yet, so there's a chance they'll abandon this nest as they did the last one. I do wish sometimes that something other than blackbirds would nest here. I did see a currawong for the first time in my garden although I didn't get a snap. They're huge black birds, but I then found out they have a habit of killing and eating small birds. I'd rather have my thornbills eating bugs than a big giant currawong any day.