activity agonistic behaviour altricial altruism amotz zahavi animal animal cognition animal language animal training antelope bee learning and communication bioacoustics birdsong body language cat cleaner fish cleaning station courtship coyote cultural learning desmond morris dog domestic sheep duetting eagle emotion in animals ethology evolution evolutionary linguistics feces finch food forms of activity and interpersonal relations frog gene gene-centered view of evolution gibbon goose great crested grebe great ape language group selection grouper gull herring gull hoverfly instinct international society for biosemiotic studies julian huxley karl von frisch konrad lorenz leopard linguistics manakin mating mimicry monkey morpheme mutualism name nigeria olfaction onomatopoeia origin of language pair bond penguin personal grooming pet phoneme positive feedback primate rabbit rattlesnake richard dawkins sexual selection snake sociobiology species stereotype symbiosis syntax talking bird the selfish gene the times toy urine wasp word yerkish zoomusicology