Circus aeruginosus
Silhouette: Mathieu Pélissié · PhyloPic
In 3 days ~10% in a week ~20%
The western marsh harrier (Circus aeruginosus) is a large harrier, a bird of prey from temperate and subtropical western Eurasia and adjacent Africa. It is also known as the Eurasian marsh harrier. Formerly, a number of relatives were included in C. aeruginosus, which was then known as "marsh harrier". The related taxa are now generally considered to be separate species: the eastern marsh harrier (C. spilonotus), the Papuan harrier (C. spilothorax) of eastern Asia and the Wallacea, the swamp harrier (C. approximans) of Australasia and the Madagascar marsh harrier (C. maillardi) of the western Indian Ocean islands.
The western marsh harrier was scientifically described by Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae under the binomial name Falco aeruginosus. Linnaeus specified the locality as Europe but restricted this to Sweden in 1761. The western marsh harrier is now placed in the genus Circus that was introduced by Bernard Germain de Lacépède... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vasai-Virar | 🇮🇳 India | |
| 2 | Rabat | 🇲🇦 Morocco | |
| 3 | Luxor | 🇪🇬 Egypt | |
| 4 | Cairo | 🇪🇬 Egypt | |
| 5 | Kalyan-Dombivli | 🇮🇳 India | |
| 6 | Indore | 🇮🇳 India | |
| 7 | Tunis | 🇹🇳 Tunisia | |
| 8 | Abu Dhabi | 🇦🇪 United Arab Emirates | |
| 9 | Surat | 🇮🇳 India | |
| 10 | Helsinki | 🇫🇮 Finland |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | ZooParc de Beauval | 🇫🇷 France | |
| 2 | Parc du Belvédère | 🇹🇳 Tunisia | |
| 3 | Tiergarten Halberstadt | 🇩🇪 Germany | |
| 4 | Hortobágyi Madárpark | 🇭🇺 Hungary | |
| 5 | Дендропарк ім. Бенедикта Дибовського | 🇺🇦 Ukraine | |
| 6 | akwarium warszawskiego ZOO | 🇵🇱 Poland | |
| 7 | hipopotamiarnia i akwarium morskie warszawskiego ZOO | 🇵🇱 Poland |
Rare
Under 5% of wildlife watchers report a Western Marsh-Harrier sighting in Budapest on a given day, based on 46 verified sightings from GBIF citizen-science data. It is the 80th most-seen of the 136 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.
May and July–August
In those months about 10% of wildlife watchers report a Western Marsh-Harrier in Budapest on a given day, against under 5% in June and September–April, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Western Marsh-Harrier sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
33rd of 82
Of the 82 cities where we can rate Western Marsh-Harrier sightings, Budapest ranks 33rd at under 5%. The best odds are in Vasai-Virar (India, about 50%), Rabat (Morocco, about 20%) and Luxor (Egypt, about 20%).
Same family: Accipitridae
The closest relatives of the Western Marsh-Harrier that you can see in Budapest (family Accipitridae, Hawks, Eagles, and Kites) are Eurasian Sparrowhawk (about 20%) and Common Buzzard (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Western Marsh-Harrier is recorded against all the birds logged in Budapest (46 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.
