. . . "The sociable lapwing or sociable plover (Vanellus gregarius) is a critically endangered wader in the lapwing family of birds."@en . . "IUCN3.1" . "Charadrius gregarius (Pallas, 1771)" . "Choetusia gregaria (unjustified emendation)" . "Chettusia gregaria (Pallas, 1771)" . "Chaetusia gregaria (unjustified emendation)" . . . . "Cheltusia gregaria (unjustified emendation)" . "Chetusia gregaria (unjustified emendation)" . . "CR" . .