PIBO MIGRATION SUMMARY
OCTOBER 11th - 20th, 2010

Swamp Sparrow

Although lots of migrants were recorded at Fish Point from October 11th - 20th, it's been a generally quiet month to date compared to previous Octobers, which contrasts with a busy couple of months at the station this August and September. But despite the reduced number of some late-Fall migrants, particularly the kinglets, it was a productive ten days and a nice variety of birds were noted throughout the summary period.

There was some active diurnal migration on October 11th including 58 Blue Jays and 47 American Robins recorded on the census along with moderate numbers of Yellow-rumped Warblers, hundreds of blackbird spp., and 15 Sanderlings. Northeast winds and cooler temperatures on the 12th produced another busy morning, with 43 species tallied during the 'count' period including 77 Golden-crowned Kinglets, smaller numbers of Ruby-crowns, Winter Wrens, Red-breasted Nuthatches, and six sparrow species. Golden-crowns were numerous the next day, with 169 birds counted, along with the first Fox Sparrows of the autumn.

Cormorants were still around in large numbers on October 14th, with 900 noted on the census, along with up to 1200 gulls (mostly Ringed-billed), but very few other waterbirds, which was the case during most of the summary period. It was moderately active on the 15th, with 33 Yellow-rumped Warblers tallied throughout the morning, along with a few lingering Blackpolls and Common Yellowthroats. Cool, clear weather and northwest winds on October 16th made for a busy morning and lots of Yellow-rumps, Hermit Thrushes, and kinglets were banded and observed along with a nice variety of other species including Orange-crowned Warbler, Blue-headed Vireo, a somewhat late Red-eyed Vireo, White-breasted Nuthatch, and Purple Finch, among others.

It was fairly active on the 17th and 18th, with forty-six species documented on the latter day including a female Peregrine Falcon at the tip, lots of kinglets and creepers, 33 Hermit Thrushes (15 banded), 45 White-throat Sparrows, and six other sparrow spp. While Hermit Thrushes and Yellow-rumped Warblers continued to move through the area on the final two days of the summary period, it was somewhat less active on the 19th and 20th, with 37 species noted on October 19th, including the first Eastern Bluebirds of the Fall.

PIBO's next migration summary will be posted on November 2nd.

Photo: Sumiko Onishi

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