Seasonal-diphenism
Guides
Eurema daira
Barred Yellow, Fairy Yellow, Barred Sulphur
Eurema daira is a small pierid butterfly exhibiting seasonal diphenism, with distinct wet and dry season morphs. The species ranges from Argentina northward through Central America, the Caribbean, and into the southern United States. Adults are active year-round in southern portions of the range, with notable dry-season emigration behavior where wet-season morphs (particularly females) move upslope 40–50 km and up to 2,000 m higher in elevation. The species has been documented as a principal pollinator of Cnidoscolus urens.