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Swallows & swifts
Barn Swallow
Hirundo rustica
Resident + winter influxHigh timing confidence
Winter influx in Chiang Mai & Lamphun
Seasonal increase beginsAug 15
PeakSep 26
Seasonal increase fadesMay 8
Best windowSep 12 – Oct 10
Habitat
- Primary
- Open sky over farms / wetlands
- Secondary
- Paddies, lakes and towns
- Elevation
- Lowland–montane
Closest practical Chiang Mai option
Mae Hia Agricultural College
~8–10 kmHigh confidence
Where to look
Timing describes the winter increase, not arrival/departure of the whole local population.
Evidence & sources
Mae Hia: checklist/site-confirmed. Other ranked locations retain the previously validated evidence mix; see Location source(s).