Arthropleura was the largest terrestrial invertebrate to have ever lived
Males make a rhythmic thrumming like a clock
Eurypterus has a long tail that looks like a scorpion's stinger
Garden spiders bounce in their webs to confuse predators
They can run up a tree trunk surprisingly fast.
The position of the Hallucigenia's head puzzled scientists for several years
Opabinia had five stalked eyes on its head.
Can jump short distances
Females live more than twice as long as males, up to 12 years old.
You may even be able to see a reflection in their reflective sequins!
Not only are the spooky looking, they get spooked easily!
You may see a mass migration of tarantulas in late summer or fall.
Ambush their prey using a trapdoor made of silk