With the first falcon they catch, he mentions its a male, and an ordinary bird, not light or dark. With the one he let go around 13:30, he said something to the effect of "... not worth all the trouble for this bird. They are looking for the white falcons and the dark falcons." I have no idea why he let that large dark one go. He doesn't say. My Arabic is not very good, especially with the dialect he uses but that's what I understood. Looks like a fun trip for sure...