The Field Frog looks similar to the related Crab-eating Frog (Fejervarya cancrivora), in being largely brown with dark markings and a series of ridges on its back. However, it differs in being smaller (up to 6 cm from snout to vent) and more slender, having reduced webbing on its feet, and a more pointed head. It may also have a pale stripe along its vertebrae. Males of this species have a black, M-shaped band across their throat.