A nice study of an adult Lesser and an adult Greater at the Richmond Sewage Lagoons southwest of Ottawa. With LESSER YELLOWLEGS, note the thin all-dark bill, light eyebrow, faint dark cap to top of head and relatively ‘clean’ underside with faint, light barring to flanks. With GREATER YELLOWLEGS, note the pale-based bill which is thicker and proportionately longer than that of a Lesser’s, more prominent streaking to the head and neck, more conspicuous orbital (eye) ring and an underside which is more heavily-marked, esp. the barring to the flanks. 18 July 2016.