Mallards can live in nearly any wetland habitat, natural or artificial. They'll make themselves at home in and around lakes, ponds, rivers, marshes, estuaries and coastlines, as well parks and backyards. That versatility (and a little help from humans, who likely introduced them in various locations) has allowed them to span across the globe, and they can be found across North America, Eurasia and New Zealand, and in parts of Central and South America, the Caribbean, Africa, the Arabian Peninsula, Japan and Australia.