ONH Spiders - Habronattus oregonensis

Habronattus oregonensis

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1 - Habronattus oregonensis male. Note swollen foreleg joint, used in displaying to a female.
06/06/2013 Hurricane Ridge Road, Olympic National Park, Washington
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2 - Habronattus oregonensis male.
06/08/2013 Hurricane Ridge Road, Olympic National Park, Washington
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3 - Habronattus oregonensis male. To spiders, orientation doesn’t matter, even on a near vertical rock face.
06/08/2013 Hurricane Ridge Road, Olympic National Park, Washington
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4 - Habronattus oregonensis male. A closeup of slide 3 showing the reflection in the exoskeleton of the eye.
06/08/2013 Hurricane Ridge Road, Olympic National Park, Washington
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5 - Habronattus oregonensis male.
06/06/2013 Hurricane Ridge Road, Olympic National Park, Washington
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6 - Habronattus oregonensis male, same individual as in slide 5.
06/06/2013 Hurricane Ridge Road, Olympic National Park, Washington
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7 - Habronattus oregonensis male.
06/15/2013 Hurricane Ridge Road, Olympic National Park, Washington
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8 - Habronattus oregonensis male, same individual as in slide 7.
06/15/2013 Hurricane Ridge Road, Olympic National Park, Washington
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9 - Habronattus oregonensis male.
06/15/2013 Hurricane Ridge Road, Olympic National Park, Washington
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10 - Habronattus oregonensis male.
06/15/2013 Hurricane Ridge Road, Olympic National Park, Washington

Like other species in the genus Habronattus, Habronattus oregonensis males have an anatomical modification of the foreleg to enhance the visual aspect of their forelegs during a display. In this case, a segment of the foreleg is enlarged and is mostly bare of bristles, so it reflects light.

We took these photos on an exposed rock face near a parking area called Double Parking on the Hurricane Ridge Road. We haven’t seen this species elsewhere.

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