pulled back from five breeding pairs

Size
Length: 14–15 cm, Weight: 20–25 g
Lifespan
10–14 years
Diet
Insectivorous – feeds on small invertebrates including beetles, caterpillars, spiders, and wētā. Forages in leaf litter and on tree trunks, hopping methodically through the undergrowth, flicking aside debris to expose hidden prey.
Habitat
Coastal forest and scrub on the Chatham Islands. Dense vegetation with good insect life and thick undergrowth for shelter. Now extremely restricted to a few small predator-free islands, living in dense, tangled vegetation, foraging low in the understorey and on the ground.
Range
Chatham Islands only – restricted to a handful of small islands in the Chatham archipelago, including Rangatira (South East Island), Mangere Island, and Pitt Island. Historically found throughout the Chatham Islands, now extinct on the main islands.
Endemism
Endemic
Main Threats
Extreme population bottleneck (once down to five individuals) makes them vulnerable to disease and inbreeding depression. Also threatened by predation from introduced mammals, habitat loss, and storms.
Population
The unique, dark-feathered specialists of the Chatham archipelago, found nowhere else on the planet. The population crashed to just five individuals in 1980, including a single breeding female named Old Blue. Thanks to decades of intensive management, the population has recovered to over 250 birds.
Conservation Status
Nationally Critical
A small, round bird that looks like it has been inked in all at once and never corrected. The black robin does not do spectacle. No bright chest. No clever markings. Just black. Total, unarguable black. As if colour was considered and declined. It lives on the Chatham Islands, in the kind of forest that closes behind you and does not apologise for it. Low branches. Dense understorey. Everything slightly damp and watching. The robin fits. It prefers it that way. Camouflage is total in the shadows. Kakaruia is curious. Unhelpfully so. It approaches humans with the calm confidence of something that has not yet learned we tend to ruin things. This has, historically, gone poorly. By the early 1980s, there were five left. Five. Which is not a population so much as a technicality. Every black robin alive today descends from that handful. A family tree that looks less like a tree and more like a tight knot. Genetic diversity is low. The bottleneck was severe. Survival required intervention. Conservationists moved birds to predator-free islands. They fed them supplementary food during hard times. A cross-fostering programme used the related Chatham Island Tomtit as a surrogate parent. This allowed the robins to raise two clutches in a single season. Nests were protected from predators. Every individual was monitored with radio transmitters. Genetics were managed with the precision of a cardiac surgeon. It worked. Against the usual odds, it worked. The strategy was intensive. The result was survival. Hunting occurs close to the ground. Leaf litter is flicked with quick, precise movements. Insects, spiders, anything small enough to be unlucky are pulled out. Larger prey gets thrashed sensibly before eating. The song is simple. A few clear notes. Just enough to say I am here. Given the circumstances, this is already doing quite a lot of work. Pairs form for life. Small territories are defended with quiet determination. Very few chicks are raised. Very carefully. Attention to detail is high. Today, the population is over two hundred and fifty birds. They are spread across several predator-free islands. It is a recovery that seemed impossible in 1980. A testament to what can be achieved when people refuse to let a species go. Kakaruia is still vulnerable. A single catastrophic event could undo decades of work. A disease outbreak. A shipwreck that brings rats to its islands. But for now, it persists. It is a bird that came within a breath of vanishing. And now continues on. Slightly inbred. Slightly fragile. Entirely real. If it hops close and looks at you, it will not seem rare. Just present. Which is, in its case, a minor miracle. Presence is the victory.