Turdus hortulorum
Silhouette: Sharon Wegner-Larsen · PhyloPic
In 3 days ~40% in a week ~70%
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.
Possible
About 20% of wildlife watchers report a Grey-backed Thrush sighting in Hefei on a given day, based on 27 verified sightings from GBIF citizen-science data. It is the 36th most-seen of the 83 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
December
In that month about 50% of wildlife watchers report a Grey-backed Thrush in Hefei on a given day, against about 10% in May–September and November, the lowest months. That is one of Hefei's driest months, with about 40 mm of rain against 230 mm in July.
Among the best
Of the 29 cities where we can rate Grey-backed Thrush sightings, Hefei ranks 11th at about 20%, level with the leaders once rounded. 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 Hefei (genus Turdus, Typical Thrushes) are Chinese Blackbird (about 90%), Dusky Thrush (about 10%) and Naumann's 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 Hefei (27 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.
