Alcedo hercules
Silhouette: Steven Traver · PhyloPic
In 3 days ~30% in a week ~60%
Blyth's kingfisher (Alcedo hercules) is the largest kingfisher in the genus Alcedo. Named for Edward Blyth, the species has also been known as Alcedo grandis and as the great blue kingfisher. Between 22 and 23 cm (8+5⁄8 and 9 in) long, the kingfisher has deep rufous underparts with a blackish blue breast patch, and brilliant cobalt blue or azure upperparts, tinged with purple. The wings are a dark blackish green, with blue speckles and tips to some of the feathers. The bill of the male is entirely black, while the female has a dark red lower mandible. The species is distinguished from the similar blue-eared kingfisher (Alcedo meninting) and common kingfisher (Alcedo atthis) by its greater size, heavy black bill, and dark lores.
The species breeds between the months of March and June. It builds nests at the end of tunnels dug in the banks of streams or ravines. Four to six eggs are laid, with both sexes incubating. A shy bird, it frequents small waterways, feeding on fish and insects caught by diving from a shrub close to the water. It is found along streams in evergreen forest and adjacent open country between 200 and 1,200 m (660 and 3,900 ft), mainly between 400 and 1,000 m (1,300 and 3,300 ft). The species ranges from Nepal through India, Bangladesh, Bhutan, China, Myanmar, Thailand, Laos, and Vietnam. Even within its preferred habitat the density of the species is low, and the population, though not thoroughly surveyed, is believed to be small, and declining further. The International Union for Conservation of Nature classifies it as "near threatened". Wikipedia →
Flight call0:05
China · 2016
© Frank Lambert · XC324634 · CC BY-NC-ND 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Namdapha National Park | 🇮🇳 India | |
| 2 | Royal Manas National Park | 🇧🇹 Bhutan |
With luck
About 10% of wildlife watchers report a Blyth's Kingfisher sighting in Namdapha National Park on a given day, based on 157 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 107th most-seen of the 298 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
February, May and October
In those months about 20% of wildlife watchers report a Blyth's Kingfisher in Namdapha National Park on a given day, against about 10% in March–April and November–January, the lowest months. June to September have too few records to rate.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Blyth's Kingfisher sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Blyth's Kingfisher sightings, Namdapha National Park has the highest daily chance: about 10%. Next come Royal Manas National Park (Bhutan, under 5%).
GBIF citizen-science records
It is estimated from how often the Blyth's Kingfisher is recorded against all the birds logged in Namdapha National Park (157 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.
