Tree Swallow
Tachycineta bicolor
When to look
Records by month. January, 121,989 records. February, 152,238 records. March, 450,113 records. April, 1,553,706 records. May, 2,443,739 records. June, 1,228,774 records. July, 665,823 records. August, 402,290 records. September, 222,595 records. October, 202,635 records. November, 86,335 records. December, 77,868 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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