S??t-nen thung-vu?t (食乳動物) ya cho-tet ham-cho phu-nen thung-vu?t (哺乳動物), he ch?? Chit-chhui Thung-vu?t A-mun ha S??t-nen-kong ( La-ten-ngi : Mammalia) ke yit-lui yung hi fu-khip khung-hi ke Vun-hiet Chit-chhui Thung-vu?t . On-cheu S?-kie Phu-nen thung-vu?t Vu?t-chung (Mammal Species of the World) yit-su chhai 2005-ngien ke ch??-liau, Phu-nen-kong muk-chhien yu-yok 5676-ke vu?t-chung, fun-phu chhai 1229-ke Su?k, 153-ke Kho lau 29-ke muk chung, yok cham Chit-sok Thung-vu?t-mun ke 10%, thi-khiu so-yu thung-vu?t ke 0.4%. Ngat-chh??-muk ( lo-chhu , ho-chu , hoi-li , sui-thun ten) , Yi?t-su-muk ( Phi?t-pho-e? ten) he Phu-nen thung-vu?t chung vu?t-chung chui-to ke muk.