The class mammalia are defined as air-breathing vertebrate animals possessing endothermy, hair, three middle ear bones, and functional mammary glands in mothers with young. There are less than 6,000 known living species, yet they represent almost half of all world coins that feature an animal.
All coin images in Daniel's Coin Zoo are from my personal collection. I collect, research, and personally photograph every coin displayed on this site. PLEASE do not take my images without permission. If you would like to use any coin image you see, just ask me. Thank you.