Western Marsh Harrier
Circus aeruginosus
When to look
Records by month. January, 134,869 records. February, 110,442 records. March, 153,862 records. April, 372,064 records. May, 346,794 records. June, 187,373 records. July, 176,526 records. August, 278,843 records. September, 299,029 records. October, 148,484 records. November, 110,935 records. December, 124,029 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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