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Raptors
Eastern Marsh Harrier
Circus spilonotus
Winter visitorHigh timing confidence
Season in Chiang Mai & Lamphun
Regular arrivalOct 3
PeakNov 7
Regular departureFeb 20
Prime windowOct 24 – Nov 21
Habitat
- Primary
- Marshes / flooded fields
- Secondary
- Paddies, reedbeds and broad wet grassland
- Elevation
- Lowland
Closest practical Chiang Mai option
Ban Thi paddies
~25–35 kmMedium confidence
Where to look
Evidence & sources
2 checklist/site-confirmed; 1 named district/range records; remaining slots use habitat + project public-hotspot evidence.