PIBO MIGRATION SUMMARY FOR THE PERIOD APRIL 20th - 30th
White-throated Sparrow

It was cool and rainy during most of the summary period with lots of east and northeast winds, precipitation on many days, and dawn temperatures ranging from 2° - 13° C. But migration continued apace and it was very active on the final day of the month, with 57 species and sixteen Spring 'firsts' recorded during the morning coverage period.

Thirty-five new arrivals were noted in the last third of April including Sora, Greater and Lesser Yellowlegs, Merlin, Red-headed Woodpecker, Least Flycatcher, Bank and Cliff Swallow, Blue-winged, Yellow and Blackburnian Warbler, and Northern Waterthrush, among others.

While activity on the lake tapered off towards the end of the month, there were lots of birds observed from the tip on the 23rd including 600 Double-crested Cormorants, 340 Bonaparte's Gulls and 160 Red-breasted Mergansers. Rain and northeast winds prevailed from the 24th - 28th, but it was active on April 27th despite the inclement weather. Forty-nine species were documented in the count area including 5 warbler spp., lots of Hermit Thrushes, and good numbers of Ruby-crowned Kinglets and Blue-gray Gnatcatchers.

After seven days of east and northeast winds (and 18 of the last 20 days without any south winds), PIBO staff awoke to a southwesterly breeze on April 29th, which resulted in a very busy morning on the 30th. Fifty-seven species were tallied including good numbers of blue jays and swallows, Gray Catbirds, Scarlet Tanagers, Rose-breasted Grosbeaks, Indigo Buntings and Bobolinks, among others. A banded Hooded Warbler was one of eight warbler species recorded on the day.


PIBO's next summary will be posted on May 12th.

Photo: Sumiko Onishi