Fox Sparrow also known as Passerella iliaca are large American sparrows. They weigh 32 g and grow up to 7.5inches in size. They have a life expectancy of 10.3 years. They feed on seeds and insects. Adults are amongst the largest sparrows, heavily spotted and streaked underneath. All feature a messy central breast spot though it is less noticeable on the thick-billed and slate-colored varieties. Plumage varies markedly from one group to another.