Exploring Eagle Hearing & Vision Capabilities To Reduce Risk At Wind Farms (great article! results haven't been published yet)
https://cleantechnica.com/2020/10/13/exploring-eagle-hearing-vision-capabilities-to-reduce-risk-at-wind-farms/Quotes: "A Blind Spot Near the Top of Eagles? Heads" and "Eagles Can Hear Frequencies Ranging Across Four Octaves" and "Red-Tailed Hawks May Be Auditory Surrogates" (uh-oh! That means an eagle will always sound like an RTH in movies!
)
Figure 1. Visual field configurations of the golden eagle (left) and bald eagle (right). The Purdue University team found both species of eagles have a blind spot near the tops of their heads (bottom row). Illustration courtesy of Purdue University