I was helping my cousin with his home-made Korean language flash cards and I noticed he didn’t have a list for animals. This is more for him, but I hope it will benefit you as well.

bear - (곰) gom

elephant - (코끼리) kkoggiri

tiger - (호랑이) horangi

giraffe - (기린) girin

monkey - (원숭이) wonsungi

lion - (사자) saja

whale - (고래) gore

hippo - (하마) hama

horse - (말) mal

pig - (돼지) deji

cow - (소) so

chicken - (닭) dakk

dog - (개) ge

cat - (고양이) goyangi

bug, insect - (벌레) bule

bird - (새) se

fish - (물고기) mulgogi

mouse - (쥐) ji