2、plover:  Etymologically, the plover is the ‘rain-bird’. Its name comes via Anglo-Norman plover from Vulgar Latin *ploviārius, a derivative of Latin pluvia ‘rain’ (source of French pluie, Italian pioggia, and Spanish Iluvia ‘rain’ and related to English flow). Various theories have been put forward as to how it came to be so called, among them that migrating plovers arrive in autumn, at the start of the rainy season; that plovers get restless at the approach of rain; and that some species have plumage spotted with pale marks, like raindrops.=> flow, pluvial
4、c. 1300, from Anglo-French plover, Old French pluvier, earlier plovier (c. 1200), from Vulgar Latin *plovarius, literally"belonging to rain,"from Latin pluvia"rain (water)"from pluere"to rain,"from PIE root *pleu-"to flow"(see pluvial). Perhaps so called because the birds' migration arrival coincides with the start of the rainy season, or from its supposed restlessness when rain approaches.