They were weighed more frequently in June than in May (a few times a week).
Last time, I said that Piper had lost a little weight, but he maintained a very consistent weight throughout the month of June. Everyone else seemed pretty normal as well.
Average weight (in grams) for June 2015:
Piper - 55g
Shade - 119g
Joey - 128g
Petey - 139g
Zuri - 127g
Pixel - 122g
Léa - 318g
Piper, Joey and Pixel's average weight for June was the same as May; Petey and Léa gained a gram, Shade gained two and Zuri lost one.
Updated table - average weights for each bird per year:
*For 2015, data from January to June is included.