The Study of Instinct

adaptiveness alarm call animal appetitive behaviour attack Baerends bees behaviour elements behaviour pattern birds cells central nervous centre chicks cichlid co-ordination colour complete component conclusion consummatory act countershading dependent digger wasp direction displacement activities display drive dummy eggs ethologist ethology evolution experimental experiments external stimuli fact feeding female fish fixed pattern function grayling butterfly growth gull Holst hormone impulses indicate individual innate behaviour innate releasing mechanisms instance instinctive behaviour intensity internal factors isolating mechanisms larva locomotion locomotory Lorenz male stickleback male three-spined stickleback mating ments models morphological motivation motor response move muscle nest observed oriented movement pectoral fins peregrine falcon phenomenon Philanthus triangulum physiological predator prey problem react receptors reflex relatively reproductive result rhythm selection sensory sexual fighting sign stimuli social releasers species stimulus situation survival value swimming territory three-spined stickleback Tinbergen tion visual wasp Weiss whole young