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Western Tiger Swallowtail Caterpillar (Papilio rutulus)

  • September 24, 2021

We are not 100% sure, but believe this is a Western Swallowtail Caterpillar. The Two-tailed Swallowtail (Papilio multicaudata) looks very similar in appearance. We’ve read that “The best... Continue Reading

A Checkered White (Pontia sp.), Female

Without a ventral (underside) view of this butterfly, we were unable to decide if this is a Western White (Pontia occidentalis) or a Checkered White... Continue Reading

Spotted Tussock Moth Caterpillar (Lophocampa maculata)

These caterpillars look like the well-known “woolly bear” caterpillar, but with the addition of long, white hairs coming from the body.... Continue Reading

Banded Garden Spider (Argiope trifasciata)

Female orbweavers (family Araneidae) construct intricate, circular webs to ensnare their insect prey. Adult male orbweavers are typically smaller and not often seen. They... Continue Reading

Douglas-fir Spittlebug (Aphrophora permutata)

As adults, spittlebugs leave their protective, foamy (spit-like) mass behind and continue their diet of plant sap out in the open.... Continue Reading

Notes from the Lab: Southern Migrations

  • September 23, 2021

Welcome back to the Lab! And happy fall! I don’t think I know a single person who isn’t excited for the... Continue Reading

Obelisk Dart (Euxoa obeliscoides)

  • September 17, 2021

Kristi remarked that this is “One of the more pretty dart moths, and this was an especially bright individual.” Pretty, indeed. Flying... Continue Reading

Monarch Caterpillar (Danaus plexippus)

This iconic caterpillar was spotted on some roadside milkweed southeast of Corvallis, Montana. Monarch caterpillars feed exclusively on milkweeds (Asclepias spp.)... Continue Reading

Salt Marsh Tiger Moth Caterpillar (Estigmene acrea)

Ellen observed this large caterpillar crawling along the sidewalk at the edge of her house. She writes, “It looked entirely black until I... Continue Reading

Cat-Faced Spider (Araneus gemmoides)

Many people refer to all orb weaver spiders as “Cat-faced Spiders” or “Barn Spiders”…but we believe this species is THE actual... Continue Reading