El Segundo Blue (Euphilotes battoides allyni) is a butterfly local to a small dune ecosystem in Southern California that used to be a community called Palisades del Rey, close to the Los Angeles International Airport (LAX). It is a federally designated endangered species. The El Segundo Blue Butterfly Habitat Preserve next to LAX exists to protect the species. There are only three extant colonies of this tiny butterfly still in existence. The largest of these is on the grounds of LAX; a further colony exists on a site within the huge Chevron El Segundo oil refinery complex, and the smallest colony is an area of only a few square yards on a local beach. The butterfly lays its eggs on Coast buckwheat, which the adults also use as a nectar source. Recently, some nearby beach cities such as Redondo Beach have replaced Ice plant growth near the beaches with Coast buckwheat, in order to provide the butterflies with more of their natural food source.