SPECIES FACT SHEET
Scientific Name: Eanus hatchi
Common Name: Hatch's Click Beetle
Technical Description:
A small (7-9 mm) shiny dark metallic-green and purple beetle in the family
Elateridae. Members of the family Elateridae are known as click beetles
because the prothorax of the beetle is articulated and with a snapping
movement, can shoot the beetle up and away from a threat. They are
typically elongate and somewhat flattened. Among the six species in the
genus, this is the only one found in sphagnum bogs at low elevation (less
than 1000 feet). Identification by an expert is likely needed.
Life History:
Adults are only active in April and May. Nothing is known about the activity
period of larvae. Adult food habits are unknown. Other members of the
genus feed on plant material, pollen, nectar, and other insects. Some do not
feed at all. Larvae may feed on plant or animal material.
Range, Distribution, and Abundance:
Range-wide: Known from only a small part of two counties in WA. Four
populations are known, all in WA; King's Lake and Snoqualmie Bogs, Lake
Marie, and Chase Lake. Significant areas have not been surveyed during the
appropriate survey window.
WA: Four known sites: Chase Lake, Lake Marie, Snoqualmie and Kings Lake
Bogs. No animals seen in Chase Lake in recent years. One site near
Edmunds, three near Snoqualmie, in Snohomish and King Counties. Patches
of suitable habitat are very small within the range. Population sizes may be
large, but as with most invertebrates, number of individuals is less important
than the number of sites at which the species is found.
OR: This species has not been found and is not expected in OR.
Federal Land: No known sites on federal land. Due to proximity of sites and
habitat, the species may occur on the Mt. Baker/Snoqualmie National
Forest.
Habitat Associations:
Found in sphagnum bogs, on floating mats. Collections have been made by
sweeping vegetation, so the species apparently spends at least part of its time
up in vegetation.
Threats:
Range-wide: Global warming could pose a long-term threat. Development and
logging affect water quality and quantity. Insecticide use, and trampling
threaten various sites.
WA: Development and logging threaten habitat directly and indirectly by
changing hydrology and water quality. Decline is probably continuing as
habitat deteriorates. Number of populations has probably declined severely
as many low elevation bogs have been destroyed.
Conservation Considerations:
Inventory: Survey for new populations in appropriate habitat. This species is
poorly known.
Research: Life history and ecology information is especially needed.
Management: Manage sites to maintain water quality and quantity threats.
Avoid pesticide or other chemical applications in proximity to sites and
habitat.
Other Pertinent Information:
References:
Global References:
Lane, M.C. 1938. A new species of the genus Eanus (Coleoptera Elateridae). PanPacific Entomologist. 14(4): 188-191.
Lane, M.C. 1971. Key to the genus Eanus. in M.H. Hatch, Beetles of the Pacific
Northwest. Univ. Washington Pub. in Biology. 16: 28-29.
U.S. Fish and Wildlife Service. 1989. Endangered and threatened wildlife and plants;
animal notice of review. Federal Register, Department of the Interior. 54(4): 554-579.
State References:
Bergdahl, J.C. 1997. Endemic Sphagnum bog beetles from the Puget Sound Region:
Kings Land and Snoqualmie Bogs, King Co., Washington. Unpub report for
Northwest Biodiversity Center.
Version:
Prepared by: John Fleckenstein
Natural Heritage Program
Washington Department of Natural Resources
Date: January 2006
Edited by: Rob Huff
Conservation Planning Coordinator
FS/BLM-Portland
June 2007