What is a Jesse used for in falconry?

A jesse is a leather strap that is attached to a falcon's leg and is used to secure it to a perch or block. Jesses are also used to attach a leash or tether to a falcon, allowing the falconer to control the bird's movements. Jesses are typically made of soft, pliable leather that is comfortable for the falcon to wear. They are often decorated with beads, feathers, or other embellishments.