Is it true that by the time a raptor leaves its nest, it has reached its full size?

The statement that a raptor reaches its full size by the time it leaves its nest is misleading and requires clarification. In truth, fledgling raptors often leave the nest before they have attained their full adult size. Many raptor species experience a growth phase after fledging, during which they continue to grow and fill out as they undergo further development. While they may reach a size close to that of adults, they do not achieve the muscular development, feather quality, or full coloring typical of mature birds right at the moment of leaving the nest.

It’s also important to note that the growth patterns can vary significantly among different species. For instance, some smaller raptors may learn to fly and hunt while still undergoing physical development, while larger raptors might take longer to fully grow.

Understanding this aspect of avian biology is crucial for falconers and those interested in raptor care, as it underscores the distinctions in developmental stages and the importance of providing appropriate care and training for young raptors after fledging.