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What Lies Behind Behaviour
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ability animal's apes appear badgers become bird migration birds bitch body brain breeding bull carnivorous carried centre child chimpanzee cockbird colour commence completely compound eyes conscious creatures deal developed direction distance domesticated ears eggs escape escape reaction exhibit experience eyes feeding feel feet female fish flight flock glands ground head hear herd hind homing pigeon hormone horse human individual insects instinct intelligence internal ear kind lateral line limbs living male mate mental mice migration miles mind monkeys mother mouse myxomatosis nest never night normal odour oestrus operation particular perception pigeons pit vipers possess probably produce puppy rabbit reason recognise reflex retina scent sense smell snakes species spider stimulus stoat territory third eyelid thrush tion tropism ungulates urine usually variety vision visual wild animals yards young animals