Swamp Sparrow at Rockburn
Some helpful comments from Charlie M. "The slight yellowish tint of the supercilium indicates this bird hatched in 2018. What we call a second-year bird. It is the plumage they have when they leave the nest, and hold until their 2nd fall molt, when they are somewhere around 15-18 months old. So most of first year and most of second year. In the month of Nov, a 2nd year bird looks the same as a bird of any older age.
Swamp Sparrow at Rockburn
Some helpful comments from Charlie M. "The slight yellowish tint of the supercilium indicates this bird hatched in 2018. What we call a second-year bird. It is the plumage they have when they leave the nest, and hold until their 2nd fall molt, when they are somewhere around 15-18 months old. So most of first year and most of second year. In the month of Nov, a 2nd year bird looks the same as a bird of any older age.