Snakes help to manage the population of insects, mice, rats and other rodents. Farmers like snakes because they help keep barns clean. Gardners like brown snakes because they eat harmful garden pests. The brown snake's favorite food is earthworms and slugs. They also eat sow bugs, insects, spiders, small fish and small frogs.
Snakes find their food by sight and smell and sometimes temperature.
They smell by flicking their forked tongues and picking up scents and carrying them to a sensory organ on the roof of their mouths. Since snakes don't have any teeth, they swallow their meals whole.