2. mammals
oviparous
reptiles
birds
fish
insects
amphibians
arthropods
vertebrated / invertebrated
predators
omnivorous
herbivorous
endangered

3. hen
chicken
sheep / lamb
goat
bull
ox
cow / calf
duck / duckling
goose
pig
horse
mule
donkey /ass
rabbit / bunny
ostrich

4. snake butterfly caterpillar
eagle ladybird deer
bear ants mouse (pl. mice)
wolf bee rat
tiger beetle pidgeon / dove
lion spider camel
crocodile grasshopper gorilla
monkey fly crab
lizard mosquito whale
worm elephant sparrow
giraffe owl frog
rino bat toad
seagull fox squirrel
swordfish hare penguin
jellyfish lice seal
kangaroo flamingo dolphin
zebra stork dinosaur
octopus snail wasp

5.  birds
 tortoise / turtle
 dog / puppies
 cat / kitten
 parrot
 goldfish
 canary
 hamster