Definition
The term *genus Erolia* refers to a now-obsolete classification of small sandpipers. These birds are currently classified under the *Calidris* genus. Historically, *genus Erolia* encompassed small sandpipers characterized by their drab plumage and a preference for muddy or sandy environments. This genus was based on certain morphological traits. These traits were later re-evaluated. This reassessment led to the reclassification of the species.