Anacondas cannot hear a thing so the communicate by sensing vibrations.They use their senses of taste and smell (as they cannot hear) to analyze chemical cues in the surroundings.Sexual mating is initiated by pheromones. Their vomeronasal system allows them to send signals with each other, find prey and smell nearby predators. Solution Anacondas cannot hear a thing so the communicate by sensing vibrations.They use their senses of taste and smell (as they cannot hear) to analyze chemical cues in the surroundings.Sexual mating is initiated by pheromones. Their vomeronasal system allows them to send signals with each other, find prey and smell nearby predators..