Discover 7 types of finch birds to look for in winter. The difference between these birds becomes clear when you compare the ...

Common and hoary redpolls are 2 closely related finches of the boreal forest and ... Immature: first-year birds resemble an adult female, but they tend to be buffier. Juvenile: brown and streaked ...

Thus, adult zebra finches retain the ability to adjust their vocal output, but differ from juveniles in that they do not seem to change their internal song model based on auditory input.