The Study of Instinct

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