Looks like it does quite well (on good images with closeup of a single bird).

Some fails:

http://i1-news.softpedia-static.com/images/news2/Washington-...

http://fc04.deviantart.net/fs71/i/2012/181/1/e/eyes_on_a_bir...

A couple that barely made it:

http://www.jlvaillant.com/Animals/Birds/Egrets-Herons/i-CDVT...

http://www.nps.gov/calo/naturescience/images/IMG_1399_edited...

On the whole, its very impressive though!