Leopards and Tigers

A week or two ago, I mentioned tigers and leopards and their fur patterns. Today, this was in the New York Times:

The first and most obvious trick is to fade into the background, as a leopard’s spots enable it to do while it’s patiently waiting to ambush a prey. The spots aren’t shaped like leaves or branches, but they form an overall “micropattern” matching the colors and overall texture of the woodland background.

That trick, though, won’t work for a predator on the move, which is why a tiger doesn’t have spots. It has a “macropattern” of stripes that break up the shape of its body as it’s stalking or running.

“The prey can detect the tiger’s movement,” Dr. Neitz says, “but if the shape isn’t recognized as the outline of a tiger, nothing registers in the higher center of the prey’s brain.”

So there you go. Leopards don't move apparently.