Sanderling (Rẽ cổ xám, Calidris alba) 
The name derives from Old English sand-yrðling, "sand-ploughman".

The sanderling (Calidris alba) is a small wading bird of the family Scolopacidae.

The bird breeds around the North Pole and is a long-distance migrant, wintering south to South America, western and southern Europe, Africa, and Australia.
Sanderling is a pass-through winter bird commonly sighted at the Xuan Thuy National Park.

Charadriidae, Charadrius: Late Latin word for a yellowish bird mentioned in the fourth-century Vulgate; from Ancient Greek kharadrios a bird found in ravines and river valleys (kharadra, "ravine").

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 Calidris is from Ancient Greek kalidris or skalidris, a term used by Aristotle for some grey-coloured waterside birds.

The specific, alba, is Latin for "white".