Gerygone fusca
Silhouette: Sheatherius · PhyloPic
In 3 days <5% in a week ~10%
The western gerygone (Gerygone fusca) is a small, brownish-grey species of passerine bird, which is found in inland and south-west Australia. It is an arboreal, insectivore of open forest, woodland and dry shrubland. It is not currently threatened with extinction (IUCN: Least Concern).
The western gerygone is a member of the family Acanthizidae (Thornbills and Allies), which has been split from the family Pardalotidae (Pardalotes). It is a sister-species to the mangrove gerygone (Gerygone levigaster). The close relationship of this phylogenetic pair is suggested by analyses of both morphological characteristics and genetic loci. Populations of a common ancestor of the two species are thought to have diverged after becoming fragmented by severe aridity during the Pleistocene. These two species are now in secondary contact in the Carpentarian Basin, but occupy very different habitats and do not interbreed.
The common name western gerygone and scientific name Gerygone fusca are recognized by the taxonomies of the International Ornithological Congress, Clement's Checklist, the Handbook of the Birds of the World and Christidis and Boles. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rottnest Island | 🇦🇺 Australia | |
| 2 | Hattah-Kulkyne National Park | 🇦🇺 Australia |
Rare
Under 5% of wildlife watchers report a Western Gerygone sighting in Hattah-Kulkyne National Park on a given day, based on 21 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 137th most-seen of the 170 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.
November
In that month about 10% of wildlife watchers report a Western Gerygone in Hattah-Kulkyne National Park on a given day, against under 5% in December to October, the lowest months. That is one of Hattah-Kulkyne National Park's wettest months, with about 40 mm of rain against 5 mm in February.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Western Gerygone sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Western Gerygone sightings, Hattah-Kulkyne National Park ranks 2nd at under 5%. The best odds are in Rottnest Island (Australia, about 30%).
Same family: Acanthizidae
The closest relatives of the Western Gerygone that you can see in Hattah-Kulkyne National Park (family Acanthizidae, Thornbills and Allies) are Weebill (about 60%), Chestnut-rumped Thornbill (about 50%) and Inland Thornbill (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Western Gerygone is recorded against all the birds logged in Hattah-Kulkyne National Park (21 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.
