In the quest to identify the world’s largest zoo, the parameters of measurement become crucial. Size can mean anything from the acreage dedicated to the zoo’s layout to the diversity of species within its bounds. For instance, stretches of land like the Red McCombs Wildlife in Texas claim over 12,000 acres, yet their scope of biodiversity doesn’t match that of a traditional zoo, with only 20 species to their name. As such, a simple numerical approach does not suffice in capturing the scale and significance of a zoo.