Zebu and Zebra.
EDIT
'Zebu' is spelt 'Xebu'!
Planet earth has an animal that starts with the letter z. Zebra starts with the letter z and is on planet earth. There are a few microrganisms that start with the letter z also.
Zebra!
Zombie...
The zodiac moth is a rainforest animal. It begins with the letter z.
Zambia and Zimbabwe begin with the letter Z. Several countries include the letter z in their name. However, no country name ends with the letter z.
A sea animal could be the Zebra Shark. It begins with the letter z.
Zebra.
Out of all fifty states, only Arizona contains a Z. And the only letter not present in any State name is Q.
Zoe is a girl name. It begins with Z.
The zebra shark is an ocean animal frequently found in coral reefs. It begins with the letter z.
Elizabeth Zane was an American heroine during the war. Her name begins with the letter z.
Efrem Zimbalist is an actor. His last name begins with the letter z.