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Intra‐brood competition can influence a variety of fitness‐related traits in birds. Previous research on the joint‐nesting Pūkeko Porphyrio melanotus melanotus, a New Zealand subspecies of Australasian Swamphen, showed that chicks that hatched earlier in a brood tended to grow faster, were more likely to survive and had higher dominance status as adults than later hatched nest‐mates. However, this...