Retractable Claws
Most cats have retractable claws. They extend their claws only when needed for capturing prey or for traction when running or climbing. When claws are not needed, the cats keep them hidden away, sharp and ready for use. Cheetahs are unable to retract their claws, and experts believe this is an adaptation to fast running (Grzimek 1988, 583).
Acute Eyesight
Vision is cats' best developed sense. Felids have sharp eyesight and their eyes are positioned on the front of their head so they both facing forward to produce the optimal focusing ability and acute depth perception.
Locomotion
Cats have extremely flexible spines, enabling them to use more muscles when running and achieve faster speeds than other mammals. Since they use more muscles when running, cats burn more energy and therefore cannot maintain speed for extended periods of time without experiencing fatigue.
Sources
For a list of sources used in the creation of this visual guide, please see the Recommended Reading page.