Ontario

he late, cold spring continued into June, creating waves of migration in the first week of the month more typ-I ical of mid-May, Cool, wet weather continued over most of the province until the third week of June, when a warming trend finally arrived, but this did not last long.Ibere was some seasonally hot weather in early July, but then rainy, cooler conditions took over [or the rest of the month.Summer bird counts and observations strongly suggested that early returning spring migrants had been especially affected by the prolonged cold in April and May, with lower than usual populations of Killdeer, Eastern Phoebes, Winter Wrens, some Dendroica warblers, and Eastern Meadowlarks.Late migrants, however, seemed to [are better, with almost [ record-high numbers of flycatchers, later-I arriving warblers, Indigo Buntings, and American Goldfinches.Most Ontario birders were taking part in the third year of the Breeding Bird Atlas and I recorded much interesting and unexpected data, not all of which has yet been compre--I hensively analysed.Several species seem to be undergoing range expansions, including !Common Raven, now nesting well south of the Canadian Shield, Northern Mockingbird, nesting in the south of the province in much-increased numbers and advancing into northern Ontario, and several sparrow species found at or beyond the limits of their usual range.Apart from atlas efforts, the summer was generally quiet for birders.Ihe cool, wet weather resulted in few rarities or southern overshoots, but unusual species included Eurasian Collared-Dove, White-winged Dove, Gray Kingbird, and Painted Bunting.Abbreviations: B.S.C. (Bird Studies Canada); K.EN.(Kingston Field Naturalists).Place names in italics refer to districts and regional municipalities as well as counties.LOONS THROUGH WATERFOWL A summering flock of 13 imm.Red-throated 2000 (MB).Two Sanderlings at the Tip of Point Pelee 20 Jun (AW) were record-late spring migrants for that location.A recordearly juv.Least Sandpiper at Presqu'ile EE 7 Jul (DS) probably reflected the fact that Arc-4 485 he late, cold spring continued into June, creating waves of migration in the first week of the month more typ-I ical of mid-May, Cool, wet weather continued over most of the province until the third week of June, when a warming trend finally arrived, but this did not last long.Ibere was some seasonally hot weather in early July, but then rainy, cooler conditions took over [or the rest of the month.Summer bird counts and observations strongly suggested that early returning spring migrants had been especially affected by the prolonged cold in April and May, with lower than usual populations of Killdeer, Eastern Phoebes, Winter Wrens, some Dendroica warblers, and Eastern Meadowlarks.Late migrants, however, seemed to [are better, with almost [ record-high numbers of flycatchers, later-I arriving warblers, Indigo Buntings, and American Goldfinches.Most Ontario birders were taking part in the third year of the Breeding Bird Atlas and I recorded much interesting and unexpected data, not all of which has yet been compre--I hensively analysed.Several species seem to be undergoing range expansions, including !Common Raven, now nesting well south of the Canadian Shield, Northern Mockingbird, nesting in the south of the province in much-increased numbers and advancing into northern Ontario, and several sparrow species found at or beyond the limits of their usual range.Apart from atlas efforts, the summer was generally quiet for birders.Ihe cool, wet weather resulted in few rarities or southern overshoots, but unusual species included Eurasian Collared-Dove, White-winged Dove, Gray Kingbird, and Painted Bunting.Abbreviations: B.S.C. (Bird Studies Canada); K.EN.(Kingston Field Naturalists).Place names in italics refer to districts and regional municipalities as well as counties.LOONS THROUGH WATERFOWL A summering flock of 13 imm.Red-throated Loons on L Ontario off Confederation Park, Hamilton 14Jun (KAM) dwindled to 2 birds by the end of Jul (m.oh.).For reasons unknown, Common Loons had extremely poor breeding success in Quetico EL, Rainy River this year (SP), though hatch rates in nearby Atikokan were about average (DHE).Bronte harbor, Halton held 12 ad.Rednecked Grebes, including 2 breeding pairs, through the period (GE), and there was a group of 46 birds off Rattray Marsh, Peel 1 Jul (LSF).A breeding-plumaged Eared Grebe frequented the Exeter S.T.E, Middlesex 10-20 Jul (RT).American White Pelicans are starting to show up in numbers on L. Superior: there were 20 on Black Bay 1 Jul (AE), 50 at Mission I. 9Jul (WZ), and 200 at Red Rock, also 9 Jul (DP).Double-crested Cormorants continued to escalate in num-VOLUME 57 (2004)

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