Western Marsh-Harrier
Circus aeruginosus
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderAccipitriformes
- FamilyAccipitridae (Accipítrids)
- GenusCircus (Harriers)
- SpeciesCircus aeruginosus (Western Marsh-Harrier)
Closest Relatives at Sierra Nevada National Park
Montagu's Harrier
Circus pygargus
Hen Harrier
Circus cyaneus
Booted Eagle
Hieraaetus pennatus
Griffon Vulture
Gyps fulvus
Golden Eagle
Aquila chrysaetos
Common Buzzard
Buteo buteo
Eurasian Sparrowhawk
Accipiter nisus
Short-toed Eagle
Circaetus gallicus
Black-winged Kite
Elanus caeruleus
European Honey-buzzard
Pernis apivorus
Bearded Vulture
Gypaetus barbatus
Bonelli's Eagle
Aquila fasciata
📅 Monthly Probability
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · across all parks (global)
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
Quick answers
What are the chances of seeing a Western Marsh-Harrier in Sierra Nevada National Park?
About 7% of visitor-days record a Western Marsh-Harrier sighting in Sierra Nevada National Park, based on 274 observer-days of citizen-science data from GBIF.
When is the best time to see Western Marsh-Harrier in Sierra Nevada National Park?
August has the highest sighting rate for Western Marsh-Harrier in Sierra Nevada National Park in our monthly data.