Anarhynchus is a genus of plovers formerly placed in the genus Charadrius.  The genus name is from Ancient Greek ana meaning "backward", and rhunkhosmeaning "bill".

1/ Greater sand plover (Choi choi lưng hung, Anarhynchus leschenaultii) 
The specific leschenaultii commemorates the French botanist Jean Baptiste Leschenault de la Tour.

2/ Kentish plover (Choi choi cổ khoang, Anarhynchus alexandrinus) 

3/ Malaysian plover (Choi choi lưng đen, Anarhynchus peronii)

4/ Siberian sand plover (Anarhynchus mongolus) 
The specific mongolus is Latin and refers to Mongolia, which at the time of naming referred to a larger area than the present country.
The species was previously known as  "lesser sand plover".