The fossil Bison at the La Brea Tarpits show some amazing evidence of seasonal migration.
By looking at the wear and number of teeth, it is possible to tell that the Bison were either 2 to 4, 14 to 16 or 26 to 30 months old. There are no animals in between these ages, so Bison were only present a few months a year.
If the Bison were born at the same time of year as modern Bison calves, the La Brea Tar Pits Bison were here every year in late Spring.
I would like to thank The Art Fund, Ruffer Curatorial Grants scheme for generously funding this research trip.