 The scientists have found that simple imitation does not itself lay the ground for culture, whether in humans or birds, but rather it is how this imitation affects the social life of an individual that matters.The complexity of several avian behaviors can be explained by the accumulation of cultural traits over many generations.In an experiment regarding at vocal behavior in birds, researchers Marler & Tamura found evidence of song dialects in a sparrow species known as "Zonotrichia leucophrys".