Following are links to graphs showing the timing of spring and fall migration in various species through our study area on the south shore of Lake Ontario. Banding records from the Kaiser-Manitou Beach station (1999 - 2001) and the Hamlin Beach station (1999 - 2000) are included in the graphs. The timing of migration in songbirds is generally thought to be controlled by day length. However, arrival times at our study sites are certainly influenced by weather patterns. Please note that peak migration periods for many species occur either before our intensive migration monitoring periods begin (ex. White-throated Sparrow in spring and many warblers in fall) or after monitoring ends (ex. Black-capped Chickadee in fall).  

The following graphs are saved as Adobe .PDF files, and the Adobe Reader is required to them.  If you do not have the reader software on your computer, you may download it for free at Adobe.  Data are the property of Braddock Bay Bird Observatory.