In all cats (and, it seems, in all felids including lynx, puma, tiger or lion) the hind margin of the ear is characteristically "split" [see the attached picture] at base - could somebody explain what is possible function of such "deformation"?
While there is no exact understanding of why, the current ”favorite” hypothesis is that this slit, called the Henry‘s pocket, basically acts like a highpass filter and allows cats to distinguish higher pitches from lower ones.
Thank you very much for the explanation! Am I right that this "Henry's pocket" is an exclusive speciality of felids, not ocurring in any other carnivore (canids, mustelids, viverrids &c.?