Wildlife & Habitat

Western Kingbird

Antioch Dunes NWR is the first refuge established solely to protect two endangered plants and one insect.  In addition to protecting the Antioch Dunes evening primrose, Contra Costa wallflower, and the Lange's metalmark butterfly, the refuge provides habitat for a diversity of native plant and animal species.

  • Lange's Metalmark Butterfly

    Lange's Metalmark Butterfly

    The Lange's metalmark (Apodemia mormo langei) butterfly was first discovered in 1933 and was described five years later.  In June 1976, this local subspecies was one of the first eight insects to be listed as endangered under the Endangered Species Act of 1973.

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  • Antioch Dunes Evening Primrose

    Antioch Dunes Evening Primrose

    The Antioch Dunes Evening Primrose (Oenothera deltoides spp. howellii) was federally listed as endangered in 1978.  Its naturally occurring population is confined to the two disjunct units of the refuge, and the adjacent PG&E and Kemwater lands.

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  • Contra Costa Wallflower

    Contra Costa Wallflower

    The Contra Costa wallflower (Erysimum capitatum spp. angustatum) is in the same family as the mustard family, Brassicaceae.  The wallflower was listed as endangered in 1978.  The entire known wild population of the wallflower consists at the refuge and adjacent PG&E and Kemwater lands.

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  • Naked-Stemmed Buckwheat

    Naked Stemmed Buckwheat

    Naked-stemmed buckwheat (Eriogonum nudum var. auriculatum) is so named because it has very few leaves along its bare stems.  This species the only plant the Lange's metalmark butterfly will lay its eggs on, and is the food plant for the Lange's metalmark butterfly larvae.