Xerces.org works for the conservation of small insects and invertebrates


The Xerces Society – Leaders in Invertebrate Conservation: Endangered Butterfly Protection, Pollinators, Stream Biomonitoring


The Xerces Society is an international non-profit organization dedicated to protecting biological diversity through invertebrate conservation. The Society advocates for invertebrates and their habitats by working with scientists, land managers, educators, and citizens on conservation and education projects.

Invertebrates eclipse all other forms of life on earth by sheer numbers and diversity. Whether measured in terms of biomass or species, invertebrates constitute 90 to 95 percent of animal life on earth. Insects make up the bulk of all invertebrates, including beetles, bees, true bugs, flies, ants, dragonflies, grasshoppers, moths, and butterflies. In addition, an amazing array of other invertebrate organisms exists: spiders, centipedes, mites, scorpions, crabs, lobsters, worms, snails, clams, squid, starfish, sea urchins, sponges, and protozoans.

The interactions of invertebrates form the biological foundation of all ecosystems: invertebrates cycle nutrients, pollinate crops and other plants, disperse seeds, maintain soil structure and fertility, exert control over populations of other organisms, and provide a major food source. In short, they supply vital ecological services to the human population.

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The Xerces Society
4828 SE Hawthorne Blvd.
Portland OR
United States 97215
tel 503.232.6639
fax 503.233.6794

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