Mammals
A baby cow
calf
A baby duck
duckling
A baby cat
kitten
A baby frog
tadpole
A baby kangaroo or koala!
joey
A baby whale
calf
A baby goose
gosling
A baby dog
puppy
A baby trout or salmon
fry
A baby gorilla or monkey
infant
A baby deer
fawn
A baby chicken
chick
A baby hamster
pup
A baby fly
maggot
A baby skunk
kit
A baby pig
piglet
A baby swan
cygnet
A baby ferret
kit
A baby wasp or bee
larva
A baby dinosaur or crocodile
hatchling
A baby goat
kid
A baby peacock
peachick
A baby horse
foal
A baby spider
spiderling
A baby platypus
puggle