Wood Sandpipers have a distinct appearance with a spotted upper body and a white breast and neck marked by brown stripes. This pattern is somewhat similar to that of other species in their genus, such as the Solitary Sandpiper (Tringa solitaria) and the Green Sandpiper (Tringa ochropus). They feature a white supercilium that extends from behind the eyes to the back of the ear-coverts, and their beak is short, straight, and has a deep olive-green base, averaging 25 to 32 mm in length. Their tarsus, which connects to the thighs, measures 32 to 41 mm. Wood Sandpipers have long legs that vary in color from yellow to nearly green, with slender toes and minimal webbing. Their hind toes barely touch the ground when standing, and their feet extend beyond the tail, which is brown with a contrasting white patch on the rump, measuring 45 to 53 mm. Breeding adults have a slim build with white, speckled upper feathers and streaked breasts and necks. Their legs are yellowish and their bill has a pale base. Non-breeding adults are characterized by brownish upperparts with grayish streaks on their breasts and lack the black spots of breeding adults. Juvenile Wood Sandpipers resemble non-breeding adults but have darker, warmer brown upperparts and more prominent spotting and streaking on their breasts. By autumn, the juveniles’ buff color fades to a whitish hue.