Turkey husbandry and use in Oaxaca, Mexico: A contextual study of turkey remains and SEM analysis of eggshell from the Mitla Fortress

Recent excavations of two domestic residences at the Mitla Fortress, dating to the Classic to Early Postclassic period (ca. CE 300-1200), have uncovered the remains of juvenile and adult turkeys (both hens and toms), several whole eggs, and numerous eggshell fragments in domestic refuse and ritual offering contexts. Holistically, this is the clearest and most comprehensive evidence to date for turkey domestication in the Central Valleys of Oaxaca, Mexico. Juvenile turkeys range in age, from recently hatched poults to young juvenile birds. Medullary bone, which only forms in female birds before and during the egg-laying cycle, indicates the presence of at least one egg-laying hen. Scanning electron microscope (SEM) images of the eggshell reveals both unhatched and hatched eggs from a range of incubation stages, from unfertilized or newly fertilized eggs to eggs nearing the termination of embryogenesis to hatched poults. We present these new data and explore turkey husbandry, consumption, and use by two residential households at the Mitla Fortress.