Among the small "peep" sandpipers, this is a beefy shorebird seen more often in wet grass than sand or water. Combination of larger size, yellowish legs, and brownish bill base is usually enough to separate from other sandpipers; also look for dense breast streaking with abrupt border at white belly. Upperparts brown with rufous tinge. Plumage and yellow legs similar to Least Sandpiper but much larger. Males have large air sac in throat, which they inflate during display.