egg sac

One egg sac can carry hundreds of eggs.

It can also spread when the spiderlings first hatch from the egg sac.

Like the praying mantis who's male through the whole thing, and then has this egg sac, but Mom and I still call it "he."

A striped fishing spider spinning an egg sac was among the winners in the Wildlife Photographer of the Year photo competition sponsored by the Natural History Museum in London.

This fishing spider is stretching out silk from its spinnerets to weave into its egg sac.