Denizens of the invisible empire

Jumping Spider 
Jumping Spider

Spiders are eight-legged arachnids (not insects) with no antennae and with fangs that have poison glands to stun or kill their prey. Most spiders have four pairs (= eight) eyes. Not all spiders spin webs; some actively hunt their food. Hunting spiders ususally have larger eyes, while spiders that spin the most elaborate webs have smaller eyes.

Jumping spiders, such as this one, lurk in ambush for their prey, then jump out to catch their meal. They have well-developed eyes to detect movement. There are some small jumping spiders living in our electron microscope lab, and you can tell that they watch what we do! They follow our movements very well.

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