Clutch size in the Gruine cranes is consistently two. Three-egg clutches, including in the Brolga (Grus rubicunda), are extremely rare, and there are no previous records of Brolgas with a brood of three. In June–July 2024, during surveys of crane breeding success in the Gulf Plains Bioregion, north-west Queensland, a Brolga pair was observed with three fledged juveniles. The young were of similar appearance and aged approximately 4–5 months. The group maintained tight cohesion while walking and in flight, typical of Brolga families, and was ~2.4 km distant from other Brolgas. The behaviour of the group and characteristics of the young were consistent with a Brolga pair attending a brood of three.