That's a Common eland (aka Southern eland aka Eland antelope aka Taurotragus oryx), which is a savannah and plains antelope of East and Southern Africa. Both the males and females have spiral horns.
On January 1, 2013, Zambia introduced a new series of coins consisting of 5, 10, and 50 ngwee pieces, plus a one kwacha coin. The older coins are still legal tender, but because their metal value is higher than their face value they have all but disappeared from circulation.
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.