Can You Trick A Mother Robin Bird With 3D Printed Bird Eggs?

The American Robin might become a paranoid bird, given the number of creatures trying to fool it. Scientists have known for quite some time that a parasite-type bird exists: the brown-headed cowbird. Rather than build its own nest, this stocky blackbird with a brown head, lays its eggs in other bird nests hoping the tricked bird will raise the abandoned chicks-to-be. According to a new scientific study, 3D printing eggs may help scientists learn how different birds respond to this activity.