Spider Eggs

Spider Eggs is an Item acquired by destroying the tier 3 Spider Nest, or killing a Spider Queen, both of which can be found after day 6. It can be placed on the ground to create a tier 1 Spider Nest, which spawns three spiders when you hit it. The Spider Eggs can be used to relocate Spider Nests found by player to any specific place. They can also be used as fuel for a fire, though it's a waste of very rare world resources.

Trivia

 * It is possible to get multiple Spider Eggs from a single Spider Nest, allowing for an infinite number of nests in a single map.
 * When examined, Wilson says: "I hope these don't hatch in my pocket."