Coracias garrulus is a blue bird with an orange-brown
back. The offspring of this bird have an effective defense
mechanism. The young birds vomit and cover themselves in
a foul-smelling orange liquid when they sense a threat by
predators. Which two systems alert the young bird to the
danger and help produce the vomit it uses as a defense?
Excretory and reproductive systems
Integumentary and muscular systems
Nervous and digestive systems
d Immune and respiratory systems