How can you identify a healthy raptor?

Identifying a healthy raptor involves observing specific physical and behavioral traits that indicate good health and vitality. Clear eyes suggest that the bird is alert and not suffering from any ocular health issues, while active behavior demonstrates that the raptor has the energy and motivation that come with being healthy. A well-maintained feather coat is crucial, as healthy feathers should be clean, intact, and properly aligned, which not only aids in flight but also indicates proper nutrition and care.

The other options contain characteristics that may not necessarily correlate with good health. For instance, bright coloring and loud vocalizations can vary widely among species and individual birds but do not provide a comprehensive measure of a raptor's overall health. A relaxed posture and frequent preening can indicate a positive mental state but may not always reflect physical health. Heavy weight, especially when accompanied by slow movements, can be indicative of obesity or other health issues rather than a sign of vitality. Thus, the combination of clear eyes, active behavior, and a well-maintained feather coat is the best indicator of a raptor's health.