biologist biology zoologist zoology ecologist ecology botanist botany mammal primate
vertebrate reptile amphibian carnivore herbivore folivore creature wildlife fauna flora
species flock herd herdsman swarm throng crowd beast brute cruel originate origin
derive stem ancestor descendant descend offspring subgroup feed breed breeding interbreed
hybridize proliferate sterility mate mating courtship lay hatch brood spawn mature skin
claw paw beak fin wing plume feather fur bristle curl insect worm pest pesticide parasite
parasitic spider butterfly mosquito cricket penguin seal tortoise turtle whale kangaroo
camel panda elephant trunk ivory horn bear wolf dragon fox cub calf pub lamp cattle
ox oxen bull buffalo horse zebra donkey saddle harness falcon hawk eagle owl swallow
sparrow pigeon crow swan goose cock mouse rat squirrel hare frog behavior behavioral
bite sting bark roar rub creep crawl habitat inhabitant nest hive cell cellular cage
stable barn hedge barrier bar anatomy anatomical anatomist epidemic gene genetic germ
bacteria virus microbe microbiology microbial metabolism metabolize metabolic protein
vitamin secrete excrete devour instinct instinctive intuitive intuition potential
intelligence intelligent functional function sensitive sense flexible flexibility
inflexible acoustic optical nocturnal dormant hibernation hibernate track trace alternate
alternative prey predator predation victim captive captivate defensive defend
self-defensive undergo suffer vulnerable subsistence exist existence exterminate
tame keeper shepherd