Turdus hortulorum
Silhouette: Sharon Wegner-Larsen · PhyloPic
In 3 days ~10% in a week ~20%
The grey-backed thrush (Turdus hortulorum) is a species of bird in the family Turdidae. It breeds in northeastern China and the Russian Far East and winters in southern China and northern Vietnam. Its natural habitat is temperate forests. A captive bred pair laid five eggs, which hatched 14 days after the first egg was laid. The young left the nest 12 days later.
The grey-backed thrush is a medium-sized Passerine. It is a sexually-dimorphic species, with males having a slate grey back and chest and white chin and belly, with rufous flanks. Females have grey or brown backs, with dark spots on the chest and similar plumage to males on the belly and flanks.
These birds are 20-23 cm long, and weigh a mean 66.7 g (range: 61-69 g). The grey-backed thrush primarily nests and forages in deciduous or evergreen forests with rolling terrain, rarely venturing above 1100 m in elevation. They eat both fruit and insects. The grey-backed thrush is currently listed as a species of Least Concern by the IUCN. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuc Phuong National Park | 🇻🇳 Vietnam |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Grey-backed Thrush sighting in Hanoi on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 89th most-seen of the 97 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
March and November
In those months about 10% of wildlife watchers report a Grey-backed Thrush in Hanoi on a given day, against under 5% in April–October and December–February, the lowest months. Those are among Hanoi's driest months, with about 50 mm of rain a month against 320 mm in August.
25th of 29
Of the 29 cities where we can rate Grey-backed Thrush sightings, Hanoi ranks 25th at under 5%. The best odds are in Shanghai (China, about 20%), Suzhou (China, about 20%) and Nanjing (China, about 20%).
Same genus: Turdus
The closest relatives of the Grey-backed Thrush that you can see in Hanoi (genus Turdus, Typical Thrushes) are Chinese Blackbird (about 10%) and Japanese Thrush (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Grey-backed Thrush is recorded against all the birds logged in Hanoi (7 verified sightings), 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.
