Esacus recurvirostris

tags: Great Thick-Knees, Greater Thick-Knees, Esacus recurvirostris, birds, mystery bird, bird ID quiz [Mystery bird] Great Thick-Knees, also known as the Greater Thick-Knees, Esacus recurvirostris, photographed on the Kosi River, Ramnagar, North India. [I will identify this bird for you in 48 hours] Image: Adrian White [larger view]. Nikon D40x with 70-300AF. Please name at least one field mark that supports your identification. Review all mystery birds to date.