Nisaetus cirrhatus
Silhouette: Sheatherius · PhyloPic
In 3 days ~40% in a week ~70%
The changeable hawk-eagle (Nisaetus cirrhatus) or crested hawk-eagle is a large bird of prey species of the family Accipitridae. More informal or antiquated English common names include the marsh hawk-eagle or Indian crested hawk-eagle. It is a member of the subfamily Aquilinae, with signature feathers, absent in tropical raptors from outside this subfamily, covering the tarsus. It was formerly placed in the genus Spizaetus, but studies pointed to the group being paraphyletic resulting in the Old World members being placed in Nisaetus and separated from the New World species. It is a typical "hawk-eagle" in that it is an agile forest-dwelling predator and like many such eagles readily varies its prey selection between birds, mammals or reptiles as well as other vertebrates. Among the members of its genus, the changeable hawk-eagle stands out as the most widely distributed, adaptable and abundant species. Individuals show a wide range of variation in plumage from pale to dark, varying with moult and age giving rise to the name "changeable".
The changeable hawk-eagle was formally described in 1788 by the German naturalist Johann Friedrich Gmelin in his revised and expanded... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Singapore | 🇸🇬 Singapore | |
| 2 | Thrissur | 🇮🇳 India | |
| 3 | Kuala Lumpur | 🇲🇾 Malaysia | |
| 4 | Tamluk | 🇮🇳 India | |
| 5 | Johor Bahru | 🇲🇾 Malaysia | |
| 6 | Kochi | 🇮🇳 India | |
| 7 | Dehradun | 🇮🇳 India | |
| 8 | Kozhikode | 🇮🇳 India | |
| 9 | Ponnani | 🇮🇳 India | |
| 10 | Colombo [Sri Jayawardenepura Kotte] | 🇱🇰 Sri Lanka |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Ninoy Aquino Parks & Wildlife Center | 🇵🇭 Philippines | |
| 2 | Gembira Loka Zoo | 🇮🇩 Indonesia | |
| 3 | Surabaya Zoo | 🇮🇩 Indonesia | |
| 4 | Bandung Zoo | 🇮🇩 Indonesia | |
| 5 | Kuala Lumpur Bird Park | 🇲🇾 Malaysia | |
| 6 | Bali Bird Park | 🇮🇩 Indonesia | |
| 7 | Negros Forests and Ecological Foundation Biodiversity Conservation Center | 🇵🇭 Philippines |
With luck
About 10% of wildlife watchers report a Crested Hawk-Eagle sighting in Thrissur on a given day, based on 399 verified sightings from GBIF citizen-science data. It is the 80th most-seen of the 217 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 30% of wildlife watchers report a Crested Hawk-Eagle in Thrissur on a given day, against under 5% in April–May, July and September, the lowest months. That is one of Thrissur's driest months, with about 30 mm of rain against 440 mm in June.
Between 4 and 7 am
Across all the parks we cover, that three-hour window holds the most Crested Hawk-Eagle sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
2nd of 13
Of the 13 cities where we can rate Crested Hawk-Eagle sightings, Thrissur ranks 2nd at about 10%. The best odds are in Singapore (Singapore, about 20%).
Same family: Accipitridae
The closest relatives of the Crested Hawk-Eagle that you can see in Thrissur (family Accipitridae, Hawks, Eagles, and Kites) are Brahminy Kite (about 20%), Crested Serpent Eagle (about 20%) and Western Marsh-Harrier (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Crested Hawk-Eagle is recorded against all the birds logged in Thrissur (399 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.
