Ron Pittaway's annual Winter Finch Forecast states that there was a widespread tree seed crop failure in both coniferous and deciduous trees in the northeast this year. When this happens, it generally means that the finches and other birds like Red-breasted Nuthatches that depend on these crops will be wandering farther and farther south in search of food, so it is possible that we could be seeing a lot of these little visitors again this year.
In two of the last three years, I did have large numbers of siskins in my winter yard, but last winter, I didn't see a single one. It's always a delight to have these entertaining little guys around, so I'll be hoping to see a lot of scenes like this in the upcoming winter.
Pine Siskin, January 2011