Lanius tephronotus
Silhouette: Andy Wilson · PhyloPic
In 3 days ~10%
The grey-backed shrike (Lanius tephronotus) is a bird in the family Laniidae inhabiting South-east Asia. The grey-backed shrike was first described in 1831 by Nicholas Aylward Vigors as L. tephronotus collected near Darjeeling, India. It is closely allied with L. schach, and formerly treated as conspecific, but differs in morphology; moreover, the two species are largely sympatric and, although race lahulensis sometimes considered to represent a hybrid population between them, there is no definite proof of interbreeding.
The species is 21–25 cm long and weighs 39-54 g. It is a shrike with long tail. The nominate race has black lowermost forehead (just over base of bill) and facial mask through lores and eye to rear ear-coverts; crown to nape and most of upperparts dark grey, small rufous rump patch; upperwing black, most wing-coverts, secondaries and tertials fringed pale rufous to whitish, sometimes tiny white patch at base of primaries (often lacking); tail chestnut-brown, tipped buffish, outermost pair of rectrices light brown; throat and undertail brownish-grey... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kaziranga National Park | 🇮🇳 India | |
| 2 | Jiuzhaigou National Park | 🇨🇳 China | |
| 3 | Manas National Park | 🇮🇳 India | |
| 4 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 5 | Chitwan National Park | 🇳🇵 Nepal | |
| 6 | Namdapha National Park | 🇮🇳 India | |
| 7 | Langtang National Park | 🇳🇵 Nepal | |
| 8 | Khao Yai National Park | 🇹🇭 Thailand | |
| 9 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 10 | Royal Bardia National Park | 🇳🇵 Nepal | |
| 11 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 12 | Jim Corbett National Park | 🇮🇳 India |
Rare
Under 5% of wildlife watchers report a Grey-backed Shrike sighting in Dhaka on a given day, based on 33 verified sightings from GBIF citizen-science data. It is the 110th most-seen of the 185 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
February and March
In those months about 10% of wildlife watchers report a Grey-backed Shrike in Dhaka on a given day, against under 5% in April to January, the lowest months. Those are among Dhaka's driest months, with about 35 mm of rain a month against 440 mm in July.
Between 2 and 5 am
Across all the parks we cover, that three-hour window holds the most Grey-backed Shrike sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
5th of 8
Of the 8 cities where we can rate Grey-backed Shrike sightings, Dhaka ranks 5th at under 5%. The best odds are in Xining (China, about 30%), Kathmandu (Nepal, about 20%) and Guwahati (India, about 10%).
Same genus: Lanius
The closest relatives of the Grey-backed Shrike that you can see in Dhaka (genus Lanius, Typical Shrikes) are Long-tailed Shrike (about 20%) and Brown Shrike (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Grey-backed Shrike is recorded against all the birds logged in Dhaka (33 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.
