Common sandpiper (Choắt nhỏ, Actitis hypoleucos)
The Common Sandpiper (Actitis hypoleucos, Choắt nhỏ) is a small Palearctic wader species, family of Scolopacidae, genus Actitis. 

The bird breeds across most of temperate and subtropical Europe and Asia, and migrates to Africa, southern Asia and Australia in winter. 
Common Sandpiper is a pass-through winter bird commonly sighted at the Xuan Thuy National Park.

The term Charadriiformes comes from New Latin, combining the Greek word kharadrios ("a bird of river valleys" or "a bird of ravines") and the Latin suffix -formes meaning "forms" or "shaped like". Therefore, Charadriiformes translates to "birds shaped like or resembling the charadrius," which is a type of plover or stone curlew historically found in dry river beds or ravines. 

The word Scolopacidae is New Latin, derived from the genus name Scolopax (Latin for "snipe" or "woodcock") and the common zoological suffix for family names, -idae.
The genus name is from Ancient Greek aktites, "coast-dweller" from akte, "coast".
The specific epithet hypoleucos combines the Ancient Greek hupo meaning "beneath" with leukos meaning "white".