As the larva grows, it has to moult (shed) its exoskeleton (skin). A monarch larva moults 5 times. The stage between moults is called an instar.
Image: Jacqui Knight
As the larva grows, it has to moult (shed) its exoskeleton (skin). A monarch larva moults 5 times. The stage between moults is called an instar.
Image: Jacqui Knight