PortlandTribune.com | It's spring, and music is taking wing: The birds are back in Portland, and their fans are listening by Ben Jacklet:   "... the "lazy trill" of the orange-crowned warbler or that "plaintive, downward slurred note" of the lesser goldfinch not to be confused with the "rapid sputtering" of the American goldfinch." Issue date: Fri, May 7, 2004.

The American Goldfinch Blog

• American Goldfinch (Wild Bird Guides)

• American Goldfinch (Article by Cornell University)

• All About Birds: Cornell Lab of Ornithology - Detailed Information concerning the American Goldfinch (Carduelis tristis)

• Tweeters

• American Goldfinch Site