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Photo#401203
jumping spider - Naphrys pulex - male

jumping spider - Naphrys pulex - Male
Baiting Hollow, Suffolk County, New York, USA
May 23, 2010
Size: 4mm
This spider didn't go anywhere, but kept turning in circles on a central axis like a wheel.
I've never noticed if all jumping spiders turn this way.

Naphrys pulex - Thanks Ben!
Moved from Jumping Spiders.

Naphrys pulex
Looks like a male Naphrys pulex.

Moved
Moved from Spiders.

Turning
From my observations, it seems as if jumping spiders can turn the cephalothorax upward--to look up--but have limited ability to turn it sideways. So they turn the whole body around. Habronattus hirsutus, which I've observed a lot, likes to sit on beach rocks around 10 cm in diameter. To survey the territory from the rock, they often rotate the whole body around 360 degrees, usually around a vertical axis between the cephalothorax and abdomen. (That is to say, not by running in a circle.)

 
Turning jumping spiders
Thanks, Stephen. That's a very good description of what I observed.

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