Washington's Coast
Washington State Department of Ecology

BEACHES
PLANTS
 
ANIMALS
razor clam
gray whale
humpback whale
butterfly
plover
crab
Once found on Washington's southwest coast, now extirpated due to habitat loss.
Coastal butterfly, coastal meadows
The Oregon Silverspot Butterfly was found along Washington's southern coast. The butterfly made its home in coastal salt-spray meadows and fringing forests. Both development and the spread of non-native plants have eliminated silverspot food and habitat.
 
Violet visitor
The silverspot requires a meadow species of violet to lay eggs and nourish its larvae. Adult food sources include: Yarrow, pearly everlasting, Canada goldenrod, and douglas aster. These plants are all native to the silverspot's habitat. Meadow plants provide food for larvae, nectar for adults. Forest fringes provide shelter from the wind.
 
Human impacts on silverspot habitat
  • Grasslands no longer maintained by fire
    The grasslands the silverspot requires are naturally controlled by fires, wind, and salt spray. With homes moving into grasslands, fires are controlled. Trees and shrubs then invade meadows, eliminating silverspot habitat.
  • Cars increase butterfly mortality
    Roads cut through meadows; butterflies hit car windshields.
  • Extreme weather kills butterflies
    An entire year's population can be lost in one year due to extreme weather conditions.
  • Development replaces meadows
    Butterfly habitat is rapidly being replaced by homes, buildings, and grazing areas.
  • Non-native plants invade grasslands
    Non-native plants such as Scot's broom crowd out the butterfly's native food sources.
violet Food for larvae
The western blue violet, a key food source for silverspot larvae, is rare due to habitat loss.

Oregon Silverspot Butterfly, US Fish and Wildlife Service. Current status on threatened listing.

Oregon Silverspot Butterfly, Washington State Department of Fish and Wildlife The Oregon Silverspot Butterfly is a species of concern.

Oregon Silverspot Butterfly, Oregon Zoo Recovery efforts at the Oregon Zoo began in 1999 and continue today.


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