Fuegian Snipe Gallinago stricklandiiis one of the least-known Neotropical snipes; its breeding biology is almost entirely undescribed. We describe the third nest ever recorded and the first away from Cape Horn, reporting nest dimensions, composition, concealment, and egg morphology, all of which are consistent with historical records. We also report new information on breeding habitat, nest structure, egg characteristics, incubation period and phenology based on a separate nest and brood in Parque La Tapera, the species’ northernmost known breeding site. Camera traps revealed an incubation period of at least 25 days and confirmed the presence of both adults near the nest. Chicks were observed earlier than previously reported, suggesting a broader phenology and possible asynchrony within populations. These findings substantially expand our knowledge of the species’ breeding biology and provide critical baseline information for conservation, particularly given its Near Threatened status and exposure to invasive predators.