All Splendid. The first three are moulting males - no other species would show blue feathers coming through on the flanks. Female Splendid has a red bill and lores, as on the birds in 4 and 5 (and unlike the black bill of female/immature Red-winged), and there's no reason to start delving into the possibility of Purple-backed or Blue-breasted (neither of which, from memory, are particularly likely in Jarrahdale) if it was associating with a male Splendid. These are the common 'garden' fairywren of WA, much more likely to be found energetically hopping about around garden hoses than the other species.