David Rimlinger, San Diego Zoo curator of birds (left), and Bill Heinrich, The Peregrine Fund's species restoration manager (right), worked with a team of biologists to fit the four harpy eagles with radio transmitter harnesses before they were released. The birds were raised with minimal exposure to humans, so in Panama they wore blindfolds during the preparation to keep from keying in on humans—and because harpy eagles have long, razor-sharp talons, their feet were wrapped to protect the people! In the hot, humid tropical forest the work was challenging, but well worth it to see the birds flying in their native habitat once again.