In addition to the eye, Dawkins discusses spiders and their webs, the origin of flight, and the nature of seashells. The natural history is charming. The science throughout is primitive. These emerge simply and without fuss. Then some demonstration is required showing that intermediate-sized noses are valuable as well.
None is forthcoming.
The emergence of powered flight is treated as an engaging fable, one in which either arboreal animals glided downward from the tree tops or a primitive dinosaur hopped upward toward the sky. A final note. In a book whose examples are chosen from natural history, it is important to get the details right. Hawks may soar or sail, but they cannot hover like helicopters. Not all organisms share precisely the same genetic code.