When opening up nest cavities, Chickadees are careful to fly off a short distance before releasing the material they’ve excavated. Presumably this helps conceal the nest location. On 4 May 1997, a breeze from the west thwarted one chickadee busily excavating a hole in Badgerow Park. “It is comical to watch one fly to a branch just west with a mouthful of sawdust, release it, and see it blow right back under the cavity.” (Marcotte diary entry)
Fall: Chickadees are usually considered non-migratory. However, periodic fall irruptions occur along the Lake Ontario shoreline, perhaps triggered by low seed crops in northern boreal forests. Of the 30 most common species banded in fall at Manitou by Braddock Bay Bird Observatory during 1999-2006, this ranked 4th with 2,165 birds taken from the nets.Seven years after the influx witnessed by Listman and VanBeurden, “25 birds hit the banding nets in (Gerhard) Leubner’s back yard in Irondequoit” on 30 September, indicating another major influx might be in progress. “After due consideration,” observers chose Oklahoma Beach, a quarter mile east of Irondequoit Bay outlet, as a vantage point. On 5 October, 503 chickadees were tallied between 1:30 and 2:15 p.m. by Mary Ann Sunderlin and Louise Zeitler. The next day, more than 7,500 were counted by Sunderlin and Mrs. Thomas McNett during just under five hours of observation. On 8 October, the vantage point was manned continually by about 10 birders from 7:15 a.m. to 5:15 p.m. A total of 17,166 chickadees were counted and 6,860 more estimated. In three peak days, 31,870 birds were tallied “and there must have been many thousands that passed when no observers were present,” Howard Miller noted. Altogether, about 42,000 were tallied 6-12 October.Interestingly, these birds were going west, in the opposite direction from the birds in 1954. “This flight seemed to turn inland just east of or over Rochester,” Miller noted. “There was no comparable flight in either direction at Manitou or other nearby points. . . Between Oct. 7 and 15 small flocks were observed passing regularly over the heart of Rochester, almost always in a southerly direction.” (KB 11:198)John Brown reported that “apparently the flight left the lake shore around Durand-Eastman Park and moved inland on a southwesterly course. Large numbers (were) reported in the Spencerport area during the week.” (BA, 19 October 1961)“Likeliest explanation of these chickadee invasions is population pressure. They have occurred in years when the food supply seemed to be ample and in years when temperatures have been mild, more or less ruling out weather and hunger as factors.” (BA, 3 October 1968)When another, lighter fall flight of chickadees was observed moving eastward over Braddock’s Bay in 1968, Miller observed, “some at least are observed passing this point every fall. About ten miles east of here, the flights turn south over the city of Rochester, although even during heavy migrations the subsequent direction of the flight south of Rochester is poorly marked. …Frequently there is a flight westward across Irondequoit Bay and then south over the city.” (KB19: 28)Another irruption in October 1975 produced a maximum count of 2,280 at Braddock Bay on the 15th (KB26: 38); the Listmans tallied anywhere from 1,000 to 2,000 each of four straight days on the 21st through the 24th at Point Breeze. (LG, November 1975)Two years later an estimated 10,000 moved along the lakeshore 24-31 October, peaking on 27 October when 763 were tallied in 45 minutes at Braddock Bay. (KB28: 41) Members of two field trips during this invasion noted chickadees “everywhere – in the woods, along the Lake Ontario State Parkway and moving down hedgerows, all going from west to east,” John Brown reported. (BA, 9 November 1977)As many as 1,200 per hour were tallied by Norm Henderson from 6-10 November 1980 at Braddock Bay. (GOS, January 1981)Another strong movement occurred roughly 13 October to 12 November 2001 when more than 1,500 were banded at Manitou, including 380 on the 13th. Bob McKinney’s inquiries later revealed this movement was confined primarily to the immediate lakeshore. People with feeders farther inland had not noticed any unusual traffic.Moreover, banding stations along the north shore of Lake Erie reported only normal numbers. However, a station at the north end of the Bruce Peninsula, which runs north-south between Lake Huron and Georgian Bay were “capturing so many chickadees they couldn’t handle them all.” About 95 percent of the captured birds that McKinney was able to “age” were chickadees born that same year. (BBBO Newsletter, Spring 2002)
Winter: