Some kinds of spiders survive all year. Others like garden zipper spiders begin as tiny spiderlings in the spring, grow all season and die at frost leaving behind, if they are lucky, a case full of eggs to hatch the next spring.
Each egg case releases a cloud of minute spiderlings too small to capture insects. Hay fever sufferers are miserable in early spring when the trees bloom releasing clouds of pollen, but tiny spiders depend on this pollen to survive. Pollen is rich in protein and other nutrients and easy to catch in tiny webs.
As the surviving spiderlings grow, they begin to capture insects for food. The bigger the spider, the bigger the insects their web can catch. By late summer garden zipper spiders are an inch long and easy to spot dressed in deep black, vivid yellow and white.
A new web is spun each morning. A spider tends to stay in the same area unless no food seems available there. Watching a spider spin a web is interesting.
The big spiders are all females and nearly blind seeing little more than light and dark. The web is spun by feel.
First the spokes are put up. Then the spider starts from the outside and puts the sticky spiral silk down attaching it to each spoke. Garden zipper spiders finish by putting a thick zigzag both up and down from the center.
The spider takes up position behind the zipper and waits. When an insect lands in the web, she races out to subdue and eat it.
Male garden zipper spiders are much smaller than females and don’t spin webs. They hunt for web of females and begin the hazardous task of wooing and mating. They tap out a message on the strands to announce their presence.
If the female is interested, the male can advance and mate. Otherwise or even after mating, he can become dinner.
The female’s abdomen gets very large. One day she spins a tear drop shaped egg case and fills it with eggs. Securing it in a hidden sheltered spot those eggs will wait for spring to hatch into next season’s garden zipper spiders.