Which activity is most indicative of a well-adjusted raptor?

Preening is a clear indicator of a well-adjusted raptor. This behavior plays a crucial role in a bird's maintenance of its feathers, which are essential for insulation, waterproofing, and flight. When a raptor is seen preening regularly, it demonstrates that the bird is comfortable in its environment and is able to engage in normal grooming behaviors, which suggests good physical and mental health.

In contrast, behaviors such as hiding from humans may indicate stress or fear, a lack of socialization, or an inability to adapt to its surroundings. Hunting without guidance is a sign of instinctual behavior, but it may also indicate that the bird is not receiving adequate training or support, which can be essential for success in a captive environment. Screaming loudly generally suggests distress or unnecessary agitation rather than comfort or adjustment, which would be contrary to the calmness associated with preening.