How much does a jack (male Merlin) typically weigh?

The typical weight of a jack, or male Merlin, is around 5.5 ounces. This information is consistent with established data on the species, which indicates that male Merlins generally weigh less than their female counterparts, ranging from about 5 to 6 ounces. Understanding the specific weight of a jack is essential for falconers as it aids in the proper care and management of these birds, particularly when it comes to considerations like food intake, weight maintenance, and overall health.

The avian physiology varies significantly between species and sexes, making weight a critical factor in falconry. When training or working with a Merlin, knowing their typical weight helps ensure they are in optimal condition for hunting and performing.