Western Marsh Harrier
Circus aeruginosus
When to look
Records by month. January, 136,070 records. February, 111,453 records. March, 155,201 records. April, 373,999 records. May, 348,826 records. June, 188,666 records. July, 177,462 records. August, 280,275 records. September, 305,613 records. October, 150,294 records. November, 111,838 records. December, 124,946 records.
Occurrence data from GBIF (incl. the eBird Observation Dataset, © Cornell Lab of Ornithology, CC BY 4.0). Descriptive, not predictive.
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