"Yellow palm warbler" or "eastern palm warbler" (S. p. hypochrysea) of the eastern third of the breeding range has brownish-olive upper parts and thoroughly yellow underparts with bold rufous breast and flank streaking. So during their spring migration, warblers travel at night; we think they follow celestial cues to stay on course. Fall passage in totals, eastern Ontario, 1990-2016. The table below summarizes such a further subdivision for the 30 warbler species seen with some regularity in southwestern Quebec and eastern Ontario. Fall passage in frequency, eastern Ontario. Fall passage in frequency, eastern Ontario, 1990-2016. Figure 14: Wilson’s Warbler. Very early September, in particular, is prime COWA season. Or sometimes they just stop cuz they’re tired, after all they’ve covered quite a few miles in the last couple of weeks. Fall passage in frequency, eastern Ontario. Figure 6: Ovenbird & Northern Waterthrush; skulkers of the underbrush. The Birds of Brooklyn series looks at some of the most familiar and fascinating birds that call Kings County their habitat. Figure 3: Cape May and Blackburnian are very similar in frequency, totals (shown), and migration timing. October: By now the warbler migration is well past peak, although a few species, such as Yellow-rumped Warbler, are moving strongly in October.Sparrow migration has picked up, and will be a major feature of the month. The "fall warblers" are one of the classic identification challenges for North American birders, perhaps immortalized best by Roger Tory Peterson's compilation plates of "confusing fall warblers". From 2012-2014 I was employed as a summer student field biologist, conducting bird surveys in the Okanagan Valley, southern Ontario, James Bay, and throughout Manitoba. Figure 9: The Heavyweight Champion of the Warblers, the Connecticut Warbler. As fall progresses, the yellow-rumped warbler transitions to its winter diet. Figure 12: Palm Warbler. Will definitely look for them around Brooklyn. I became interested in birds while studying under the tutelage of Carleton University professor and naturalist, Michael Runtz. As insects get harder to find, it starts eating berries, especially bayberries, also known as myrtle berries. Fall passage in frequency, eastern Ontario. Comments are moderated and will be posted after BBG staff review. YEWA, BAWW, AMRE, and CSWA. Figure 16: Yellow-rumped Warbler. Mourning, in particular, is a prize find. The females incubate and they are monogamous. Colorful warblers, orioles, and tanagers decorate every bush and provide eye-level views as they forage ravenously to recover from the difficult flight. YEWA, BAWW, AMRE, and CSWA. 1990-2016. Many birders refer to it by the pet name “butter butt.” Be sure to look for this delightful bird this fall! 1990-2016. 1990-2016. The not-so-confusing fall warblers Many references have broken down fall warblers into those featuring wing bars and those without, but some further subdivisions are useful in breaking up the species further. There are two commonly found summer warblers, two winter warblers and five or more additional warbler species that pass through during fall and spring migration. There is an excellent chance that you’ll see some of these birds at BBG now, especially in the Native Flora Garden, as they feed in the bayberry bushes and other shrubs. Yellow-rumped Warbler on fall migration – Nikon D500, f7.1, 1/800, ISO 400, Nikkor 500mm VR with 1.4x TC, natural light. This is one of our most widely distributed warblers, nesting from the Arctic Circle to Mexico, with closely related forms along tropical coastlines. It was frustrating that when the Yellow-rumped Warblers flew into the tree that most of the time I had branches obscuring my view of the birds and that it was difficult to find these warblers out in plain view. 1990-2016. Fall passage in frequency, eastern Ontario. While most of its relatives migrate to the tropics in fall, the Yellow-rump, able to live on berries, commonly remains as far north as New England and Seattle; it is the main winter warbler in North America. During the summer, the warblers you are most likely to find in San Francisco are the bright Yellow Warbler (an all yellow bird), and the Wilson's Warbler - also yellow, but with a dark black cap. Not at all typical finds during fall migration! But when the fog rolls in, they fall out in random places, until the weather changes. Fall passage in frequency, eastern Ontario, 1990-2016. Figure 13: Pine Warbler. Figure 2: Common Yellowthroat and American Redstart are very similar in frequency (shown), totals, and migration timing. Please keep your comments relevant to this article. Figure 4: Golden-winged, Blue-winged, and Brewster’s (hybrid). Yellow-rumped Warblers lay 3 to 5 eggs which hatch in 12 to 13 days.