What Is a Finger Long Finger?

The eyes fourth and longest finger accounts for more than two thirds the length of its hand. The most I could find about like the actual joint is that it sounds like it's a kind of typical ball joint socket. But in general is a flexible finger and actually pretty dexterousLike they have relatively good control over the finger and fingers in general. They use them to tap on like bark and wood to basically get insects to move and also to have those vibrations bounce around.