Sparrows Sing Higher to Pierce Urban DinWhite-crowned sparrows in San Francisco are singing in a higher pitch than they did in 1969 to be heard over louder traffic.#httpswwwscientificamericancompodcastepisode
White-crowned sparrows in San Francisco are singing in a higher pitch than they did in 1969 to be heard over louder traffic.#httpswwwscientificamericancompodcastepisode
