Tracking what's alive on Earth and what affects it.
Humans, now
On the wall: 1,000 or fewer left in the wild
Kiwikiu (Maui parrotbill)
about135
Estimate, no range
2021
Pseudonestor xanthophrys
Hawaiʻi, east Maui high-elevation forest (about 2,155 hectares)
Counted 2021, by the U.S. Fish and Wildlife Service.

The latest official number for the kiwikiu is about 135 birds in the wild: an estimate with no range, dated 2021 and published by the U.S. Fish and Wildlife Service.
Avian malaria eventually killed every kiwikiu moved to Nakula Natural Area Reserve, the U.S. Fish and Wildlife Service reports.
How it was counted
The figure is an estimate of birds (not pairs, nests or area) that covers every kiwikiu in the wild, published by the U.S. Fish and Wildlife Service without a range. The 2 birds in captivity, which do not breed, are counted separately and are not part of it.
This is an estimate that the U.S. Fish and Wildlife Service published without a range, so read it as about 135 birds rather than exactly that many.
What moves it
The U.S. Fish and Wildlife Service names avian malaria, which eventually killed every bird moved to Nakula Natural Area Reserve, and a climate increasingly favourable to mosquitoes, which has confined the kiwikiu to higher forest. The agency also names people and feral pigs destroying habitat, and introduced predators such as rats, feral cats and mongooses.
- avian malaria: every bird moved to Nakula Natural Area Reserve in 2019 eventually died of it.
all released birds eventually succumbed to avian malaria
Source: U.S. Fish and Wildlife Service. - a climate increasingly favourable to mosquitoes, which has confined kiwikiu to higher forest.
Increases in climate favorable to mosquitoes has restricted kiwikiu to higher elevation habitats
Source: U.S. Fish and Wildlife Service. - habitat destruction by people and feral pigs. Source: Maui Forest Bird Recovery Project.
- introduced predators: rats, feral cats and mongooses. Source: Maui Forest Bird Recovery Project.
The next count
Counts of the kiwikiu come at irregular intervals, and no date is known for the next (checked 12 November 2026).
Sources
- U.S. Fish and Wildlife Service Last checked 12 November 2026.
- Maui Forest Bird Recovery ProjectKiwikiu Last checked 12 November 2026.
What changed
- 12 November 2026 Added to Live Species, on the wall (1,000 or fewer): About 135 (Estimate, no range, 2021).
Next on the wall

The letter
The letter comes once a month, on the first Thursday. It gives what changed on Live Species, one animal up close and the humans figure for contrast.