Entomophagy, or the practice of eating insects, has a long history, and is currently practised by two billion people world wide. The report counts around a thousand edible insect species, from the small grasshoppers served "toasted in a little oil with garlic, lemon and salt" on the streets of Oaxaca, to the fly eggs, gathered from stagnant water, that Montezuma enjoyed for breakfast, which the report optimistically terms "Mexican caviar".