Acanthiza nana
Silhouette: Matt Wilkins (photo by Patrick Kavanagh) · PhyloPic
In 3 days <5% in a week ~10%
The yellow thornbill (Acanthiza nana), formerly known as the little thornbill, is a tiny passerine bird endemic to the eastern coast of Australia. While currently listed as Least Concern by the IUCN, the general consensus is that the population is decreasing.
Acanthiza nana was named by Irish zoologist N. A. Vigors and American naturalist Dr Thomas Horsfield in 1827, with the bird noted in the Sydney Cove area. However, the earliest field notes with type description record the yellow thornbill in 1803, with records sent at the time to the Linnean Society of London. The generic name Acanthiza derives from Ancient Greek akantheōn 'thorn-brake' and zaō 'live, inhabit'. The specific epithet nana is Latin for a 'female dwarf'. The yellow thornbill is one of 13 currently recognised species of thornbill within the genus Acanthiza. There are five species groups recognised within this genus, with the yellow thornbill (Acanthiza nana) most closely related to the striated thornbill (Acanthiza lineata). The only Acanthiza species which occurs outside Australia, the New Guinea thornbill (Acanthiza murina), also bears close molecular similarities to both the yellow and striated thornbills... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Blue Mountains National Park | 🇦🇺 Australia | |
| 2 | Hattah-Kulkyne National Park | 🇦🇺 Australia | |
| 3 | Booderee National Park | 🇦🇺 Australia | |
| 4 | Grampians National Park | 🇦🇺 Australia | |
| 5 | Royal National Park | 🇦🇺 Australia | |
| 6 | Lamington National Park | 🇦🇺 Australia | |
| 7 | Great Otway National Park | 🇦🇺 Australia |
Rare
Under 5% of wildlife watchers report a Yellow Thornbill sighting in Great Otway National Park on a given day, based on 24 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 147th most-seen of the 175 birds we can rate there. Over three days the chance rises to under 5%, and over a week to about 10%, if each day is a fresh chance.
May
In that month about 10% of wildlife watchers report a Yellow Thornbill in Great Otway National Park on a given day, against under 5% in June to April, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Yellow Thornbill sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
7th of 7
Of the 7 parks where we can rate Yellow Thornbill sightings, Great Otway National Park ranks 7th at under 5%. The best odds are in Blue Mountains National Park (Australia, about 20%), Hattah-Kulkyne National Park (Australia, about 10%) and Booderee National Park (Australia, about 10%).
Same genus: Acanthiza
The closest relatives of the Yellow Thornbill that you can see in Great Otway National Park (genus Acanthiza, Australasian Thornbills) are Brown Thornbill (about 70%), Striated Thornbill (about 30%) and Buff-rumped Thornbill (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow Thornbill is recorded against all the birds logged in Great Otway National Park (24 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
