40-spotted Pardalote

The 40-spotted Pardalote (Pardalotus quadragintus) is a tiny bird with a very large presence in Australian conservation concern. At roughly 10 cm long and weighing less than 10 grams, it is one of the smallest birds in Australia — and one of the most geographically restricted. It is found only in Tasmania, and only in patches of white gum (Eucalyptus viminalis) forest near the coast. Outside these stands, it essentially does not exist.

The relationship between the 40-spotted Pardalote and white gum is total. The birds feed on a sugary secretion called manna produced by the white gum's leaves, as well as insects gleaned from its bark. They nest in the trees' hollow branches. When white gum is removed from a landscape — for farming, development, or changed land management — the Forty-spotted vanishes with it.

Unlike its more widespread cousins (the Spotted and Striated Pardalotes are familiar garden birds across the mainland), the Forty-spotted is genuinely rare. A total population estimate of around 1,500–2,000 birds makes it one of Australia's least numerous bird species. The island populations are small and fragmented — Bruny Island holds the most important known colony, with smaller numbers at Maria Island, Bowen Island, and a handful of mainland Tasmanian sites.

For visiting birders, the Forty-spotted Pardalote is a key target — and one of the more achievable of Australia's rarest birds. The Adventure Bay area on Bruny Island, and the white gum groves at Dennes Point, offer genuine year-round access to the species, particularly in the morning when birds are actively foraging in the canopy. Binoculars are essential: they move constantly and high, and the white spotting can be hard to pick out against bright canopy.