Tree Swallow
Tachycineta bicolor
When to look
Records by month. January, 146,635 records. February, 177,859 records. March, 481,894 records. April, 1,642,510 records. May, 2,646,629 records. June, 1,308,524 records. July, 708,750 records. August, 440,973 records. September, 260,529 records. October, 243,938 records. November, 107,139 records. December, 98,272 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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