This week I noticed Aldo’s jesses, the leather straps that hang from his legs, becoming more and more stiff. He seemed to notice, too, when he stamped his feet to move the leather to a more comfortable position. It was time to apply an oil to condition the leather. Luckily falconry suppliers make a conditioner specifically for this purpose: jess grease.
To condition the whole length of each jess, I need to remove the leash that binds the pieces of leather together and secures him to my glove when he is out of the mew. That means that if he tries to fly away during this process, he is more likely to escape. In case he gets away from me, I choose the smallest room with the lowest ceiling and fewest perches: the staff bathroom. Applying the jess grease is easy and I simply rub it in with my fingers. The grease will sink into the leather to keep it supple and waterproof for a few more weeks.