Is kangaroo a proper or common noun?

The noun kangaroo is a common noun, a Word for any kangaroo.

A proper noun is the name of a person, place, thing, or a title; for example:

• Captain Kangaroo, TV personality
• Kangaroo Island SA, Australia
• Kangaroo House Bed & Breakfast, Eastbound, WA
• Kangaroo Pouch Ltd. (children's clothing), Atlanta, GA