When does a raptor tend to reach its full size?

Raptors generally reach their full size shortly after they leave the nest, often referred to as fledging. During this period, they are fully developed and have the physical attributes required for flight and independent living, including muscle strength and wing size. The time leading up to fledging involves significant growth and development as the juvenile raptors prepare for life outside the nest.

While some species might continue to mature and gain weight after leaving the nest, their overall size is typically achieved by that time. The other options reflect different stages of development rather than the point of reaching full size. For example, reaching full size at six months or one year of age suggests ongoing growth beyond the fledging stage, which is not accurate for most raptors. Similarly, waiting until five years of age is relevant to sexual maturity and behavior rather than physical size. Therefore, the moment a raptor leaves the nest is the key point for considering its full size.