The proper question is not "Will the birds of prey take the rooster?" but rather will the birds of prey KILL my rooster? The answer is YES and it matters little the size of the rooster in question.
Most hawk attacks are low level affairs that are only undertaken after the hawk has spent considerable time scoping out your flock from the safety of a tree limb or from the top of your coop. CDs, fishing line, or other visual deterrents are unlikely to make a hill-of-beans worth of difference in whether your chickens are safe or else become hawk scat.
Observe how useless red fishing line would be in stopping these hawk attacks, and watch how late the rooster shows up to defend his harem.
Come on @chickengeorgeto, take into consideration species of hawk. My roosters are also a lot faster and more capable than that fluffy butted ornamental. Chicken breed needs to be considered as well and do not omit the effective ones.