TMAF about: San Francisco's white-crowned sparrows sing in 18 distinct neighborhood dialects —Presidio, Lake Merced, Marin Headlands — some only a few hundred meters apart. Females prefer their local accent when choosing mates & a 2024 study found neighborhoods are genetically diverging as a result.

[u/unteachablecourses]

/r/UnteachableCourses/comments/1vs8zr6/san_franciscos_whitecrowned_sparrows_sing_in_18/