E. affinis

E. affinis may refer to:
 * Emberiza affinis, the brown-rumped bunting, a bird species found in Africa
 * Eleutherodactylus affinis, a frog species endemic to Colombia
 * Elops affinis, the Pacific tenpounder or Pacific ladyfish, a fish species
 * Empidonax affinis, the pine flycatcher, a bird species found in Mexico and Guatemala
 * Eremobates affinis, an arachnid species
 * Euphonia affinis, the scrub euphonia, a bird species found in Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico and Nicaragua
 * Euthynnus affinis, the kawakawa or false albacore, a fish species