Which term describes a falconry bird taken as a nestling?

The term that describes a falconry bird taken as a nestling is "eyases." Eyases refer specifically to young birds that have not yet fledged or left the nest, typically used when discussing birds of prey in the context of falconry. This term is pivotal in falconry as it distinguishes between different life stages of birds and helps falconers understand the developmental needs of the birds they are training.

A haggard refers to an adult bird that has already flown and is no longer in its juvenile phase. A tiercel describes a male falcon, particularly in species like the peregrine. Finally, a brancher is a bird that has left the nest but may still not be completely independent or fully capable of flight. Understanding these terms helps falconers communicate effectively about the stages of a bird's life cycle and how to manage their training and care.