Hello, I’d like to report a new bird at my feeder too. They looked like a very stripy sparrows on my goldfinch feeder. But after looking in my Birds of Michigan Book, I think they are Pine Siskins. Robert~ Diamondale, MI
The Pine Siskin, a member of the finch family, is closely related to the Redpoll and the Goldfinches. The Siskin is an irruptive species that can be common in mid-Michigan some winters and scarce in others.
As winter approaches, Pine Siskins become considerably plumper to help them survive. Each bird can pack sufficient seeds into its expandable esophagus to support itself through five hours of rest at -4 degree Fahrenheit temperatures.