What term refers to the nest ledge of a falcon?

The term that refers to the nest ledge of a falcon is "eyrie." This term specifically describes the elevated nest created by birds of prey, such as falcons, where they lay their eggs and raise their young. An eyrie is typically located on high cliffs or tall trees, providing a safe and secure location for the birds.

The other terms listed have different meanings within the context of falconry and bird behavior. "Brancher" refers to a young bird that is learning to fly and is often seen branching out from the nest in preparation for taking its first flights. "Tiercel" is a term used to designate a male falcon, specifically in the context of species like the Peregrine Falcon, where the male is generally smaller than the female. "Passager" describes a juvenile falcon that has completed its fledging stage and is now flying well but typically has not yet reached maturity. Each of these terms pertains to different stages or attributes in the life cycle and classification of falcons but does not specifically denote the nest ledge.