Kaiser's rock rat
Kalinowski's agouti
Kalinowski's mastiff bat
Kalinowski's oldfield mouse
Kalubu echymipera
Kam dwarf hamster
Kamchatka shrew
Kangaroo Island dunnart
Kashmir cave bat
Kashmir field mouse
Kashmir shrew
Kazbeg birch mouse
Keays's rice rat
Keen's myotis
Kei myotis
Kelaart's long-clawed shrew
Kelaart's pipistrelle
Kellen's dormouse
Kellogg's rice rat
Kemp's gerbil
Kemp's grass mouse
Kemp's spiny mouse
Kemp's thicket rat
Kenneth's white-toothed rat
Kenyan big-eared free-tailed bat
Kerala rat
Khartoum gerbil
kiang
killer whale
Kimberly mouse
Kimberly rock rat
Kinabalu squirrel
king arboreal rice rat
king colobus
king horseshoe bat
king jird
king mole rat
king rat
kinkajou
Kintampo rope squirrel
Kirk's dik-dik
Kivu climbing mouse
Kivu shrew
klipspringer
Kloss squirrel
Kloss's gibbon
Kloss's mole
Kluchor birch mouse
koala
kob
Kobayashi's serotine
Kobe mole
kodkod
Koford's grass mouse
Kolan vole
Komodo rat
Kondana soft-furred rat
Koopman's pencil-tailed tree mouse
Koopman's porcupine
Koopman's rat
Korean field mouse
Korean hare
Korinch's rat
kouprey
kowari
Kozlov's pika
Kozlov's pygmy jerboa
Kozlov's shrew
Kreb's fat mouse
Kuhl's pipistrelle
kulan