There is a point in the Torres Strait where Australia’s bird list stops looking Australian at all. On Boigu Island, just six kilometres from the Papua New Guinea mainland, species that barely register on mainland checklists turn up as a matter of course, drawn south by a sliver of freshwater swamp and mangrove that happens to sit on the right side of an international border.
Australian Geographic Travel has launched a new expedition built around exactly that quirk of geography. Birds of the Borders: Boigu Island Expedition is a five-day, four-night trip to Australia’s northernmost inhabited island, targeting species that reach the very edge of their range here, many of them far more familiar to birders working in New Guinea than anywhere on the Australian mainland.
A Papuan bird list on Australian soil
Boigu covers just 89.6 square kilometres of freshwater swamp, mangrove and samphire wetland, and rises no more than 18 metres above sea level at its highest point. That low, wet, tropical habitat, paired with proximity to New Guinea, produces a species list unlike anything found elsewhere in the country.
Target species include the red-capped flowerpecker, orange-fronted fruit-dove, Papuan hornbill, collared imperial pigeon, magnificent riflebird, Gurney’s eagle, palm cockatoo, Papuan spine-tailed swift and eclectus parrot, alongside great-billed heron, mangrove robin, little kingfisher, black-necked stork and a run of migratory shorebirds. For serious birders, it’s a rare chance to tick Papuan specialities without leaving Australian territory, in habitat that barely exists elsewhere on the mainland.
The itinerary runs eight guided birding sessions across village-edge habitat, dawn creek systems, mangrove channels, freshwater wetland and the northern coastline facing Papua New Guinea, with numbers capped at eight guests to keep the experience genuinely small-scale.
Guided by the people who know the island best
Every birding session on Boigu is accompanied by a local Indigenous coordinator, and the expedition has been developed in partnership with the Malu Kiai Rangers, who manage the island’s land and sea Country. Sessions are timed to tidal patterns rather than a fixed schedule, an approach that reflects how the island’s ecosystems, and the people who know them, actually operate.
Guests receive a Welcome to Country on arrival, and the tour closes with a traditional feast and island dancing on the final evening. An optional traditional fishing session with community members runs mid-tour. Kalau Kawau Ya is the language spoken on Boigu, and cultural briefings woven through the birding sessions give the trip a grounding in place that a straight species count alone wouldn’t capture.
Getting there is part of the story
Reaching Boigu is not straightforward, which is part of what makes the destination feel genuinely remote. Travellers fly with Qantas from Cairns to Horn Island, then join a private charter flight to the island itself. Accommodation is in community-run facilities on Boigu, with all meals, guided birding sessions and cultural experiences included in the tour price. Travel insurance, pre- and post-tour accommodation in Cairns, and gratuities are not included.
The expedition is priced from $9,990 per person, twin share, with departures from Cairns in April and October 2027.
For birders who have exhausted the more accessible corners of Australia’s checklist, Boigu offers something genuinely different: a northern frontier where the country’s bird life quietly gives way to New Guinea’s, guided by the community whose Country it is.
