Name the Artist: Joy To The World?

Questions

What is the collective term that is used to refer to animals that feed on the remains of dead animals or plants?

Which Australian bird is known as the Laughing Jackass?

Which pigment is obtained from cuttlefish and squid?

What physical characteristic do pinnipeds have?

What name is given to a larva of the salamander whish never fully develops because of a hormone deficiency although it can breed?