What type of jesses should be used when free-flying a raptor?

Field jesses are specifically designed for free-flying raptors because they provide flexibility and comfort for the bird during outdoor activities. They typically feature a longer design that allows for more freedom of movement while still ensuring the raptor is secure. This is critical because, when a bird is in flight, it needs to be able to maneuver freely without the risk of entanglement or restriction that could occur with other types of jesses.

In contrast, mews jesses are often used when a bird is housed in a mews or aviary and do not provide the same level of mobility needed during free flight. Leather jesses, while durable, are not inherently suited to the demands of outdoor flight compared to field jesses. One-piece jesses, while they offer some benefits in terms of simplicity, may not provide the same versatility and ease of use in a free-flying environment.

Overall, field jesses are the most appropriate choice for ensuring both the safety and the mobility of a raptor when it is free-flying.