Fall Warbler Migration Guide

The following warbler graphs are organized from early season to late season. Note that many species share the same peak dates (mid to late August).

Figure 1: Our earliest season warbler, the Yellow Warbler, paired with other abundant, early August species. YEWA, BAWW, AMRE, and CSWA. Fall passage in frequency, eastern Ontario, 1990-2016.

Figure 2: Common Yellowthroat and American Redstart are very similar in frequency (shown), totals, and migration timing. Fall passage in totals, eastern Ontario, 1990-2016.

Figure 3: Cape May and Blackburnian are very similar in frequency, totals (shown), and migration timing. Fall passage in totals, eastern Ontario, 1990-2016.

Figure 4: Golden-winged, Blue-winged, and Brewster’s (hybrid). Not at all typical finds during fall migration! Fall passage in totals, eastern Ontario, 1990-2016.

Figure 5: Mourning Warbler & Canada Warbler. Both are highly sought-after species, and, rightly so! Mourning, in particular, is a prize find. Fall passage in totals, eastern Ontario, 1990-2016.

Figure 6: Ovenbird & Northern Waterthrush; skulkers of the underbrush. Fall passage in totals eastern Ontario. 1990-2016.

Figure 7: Nashville & Tennessee warblers. Fall passage in frequency, eastern Ontario. 1990-2016.

Figure 8: Blackpoll & Bay-breasted warblers. For information on how to separate these two look-a like’s, please see http://eontbird.ca/?p=873. Fall passage in frequency, eastern Ontario. 1990-2016.

Figure 9: The Heavyweight Champion of the Warblers, the Connecticut Warbler. The best time to look for this species is from the last few days of August through to the beginning of the second week of September. Very early September, in particular, is prime COWA season. Fall passage in totals, eastern Ontario. 1990-2016.

Figure 10: Northern Parula & Magnolia Warbler. Fall passage in frequency, eastern Ontario. 1990-2016.

Figure 11: Black-throated Green and Black-throated Blue Warbler. Fall passage in frequency, eastern Ontario. 1990-2016.

Figure 12: Palm Warbler. Fall passage in frequency, eastern Ontario. 1990-2016.

Figure 13: Pine Warbler. Fall passage in frequency, eastern Ontario. 1990-2016.

Figure 14: Wilson’s Warbler. Fall passage in frequency, eastern Ontario. 1990-2016.

Figure 15: Orange-crowned Warbler. A highly sought-after and characteristically late-season migrant. Fall passage in frequency, eastern Ontario. 1990-2016.

Figure 16: Yellow-rumped Warbler. Fall passage in frequency, eastern Ontario. 1990-2016.