This morning for the first time in 2010 I was able to band birds. About 200 American Goldfinches swarmed at the banding station. I banded a dozen. I also caught a single House Finch and Pine Siskin. Many non-banders are unaware that, in the field, you call tell the sex and often the relative age of most basic-plumaged (winter) goldfinches. I thought I would share these photos with you. (The photos were taken against a snow drift, hence the white backgrounds.)
Male and female American Goldfinches can be told apart by their wing color: jet black in males, charcoal in females.
Compare that color to the bird below.