Breeding performance and predation rates
All 12 males made at least one breeding attempt (3±1 nests; 1–5), but only 3 nests (each from a different male, or 25% of focal males) produced fledglings. In total, we found 34 completed nests across the 12 focal territories. We found nest predation to be highest during the nestling care stage. More specifically, we recorded 10 predation events, of which 9 (26%) were of known stages: 2 (6%) during the egg stage and 7 (21%) during nestling care. We found the 10thattacked by Argentine ants, which only attack nests with edible contents, the day after its discovery, before we could confirm weather eggs or nestlings were inside. Therefore, it is unclear whether it had been predated during late-egg stage or early nestling stage.