Goldfinches eat sunflower leaves. Hard to imagine.
Some photos of the birds and the partially eaten leaves are here.
Below is a link to a short movie of some goldfinches eating sunflower
leaves. This has be going on in our garden for years but we
thought the leaf damage was from insects. Now we know that the
real culprits are leaf eating goldfinches!
to open the movie (.mov) in another window or tab.