An unfamiliar insect raises two useful questions: what is it, and does the observation call for a closer look? Washington's hornet and Japanese beetle information helps gardeners separate distinct pests, understand what has been detected, and consider the movement of plants and soil. Read each species' status carefully. A photograph of one insect, an eradication declaration, and a quarantine rule describe different situations.
The Washington State Department of Agriculture's hornet information explains that invasive hornets threaten honey bees and other pollinators. It cites USDA's estimate that insect pollination adds more than $34 billion in economic value to U.S. agricultural crops each year. Invasive hornets can attack and destroy honey bee hives, making their detection relevant beyond the individual insect a gardener happens to notice.
Japanese beetle presents a different concern: feeding damage to plants and the possibility of transport with garden materials. Keep these concerns distinct when reviewing a sighting. An insect's identity, the place it was observed, and any plant material being moved are useful parts of the question. General concern about invasive insects should lead to careful identification rather than an assumption about every unfamiliar insect.
At the end of 2024, the Washington State Department of Agriculture and USDA declared the northern giant hornet eradicated from Washington and the United States. WSDA found and eradicated four nests in Whatcom County during 2020-2021. No northern giant hornets were detected from 2022 through 2024, giving the agencies three years without confirmed detections before the declaration.
The northern giant hornet attacks many kinds of insects and poses a particular threat to honey bees, according to WSDA. That explains the attention given to its nests and detections. When reading about this species, keep the eradication declaration with the earlier nest reports. The 2020-2021 findings and the status announced at the end of 2024 belong to the same sequence of monitoring and eradication work.
In April 2026, a yellow-legged hornet was photographed alive at the Port of Vancouver in Washington. WSDA reports trapping and outreach to check for other hornets in the area. This is a report of a photographed insect; it should not be described as an established Washington population. It also concerns a different species from the northern giant hornet covered by the eradication declaration.
WSDA describes the yellow-legged hornet as an invasive pest throughout Europe, where it has caused losses of up to 30% of honey bee hives and honey. Those losses describe the European experience. They are not a forecast for a particular Washington garden. Use the Washington detection and the agency's monitoring information to understand the local report without substituting the experience of another region.
WSDA's Japanese beetle overview describes an invasive insect that feeds on more than 300 plants. Adults skeletonize leaves and damage buds, flowers, and fruit. The grubs live in soil and eat grass and other roots. These different life stages explain why attention to leaves alone does not address every concern about moving garden materials.
The beetle can travel in potted plants, soil, yard debris, and cut flowers. Washington's Japanese beetle quarantine prohibits movement of plants, soil, plant waste, and other items out of the quarantine area, which affects parts of Yakima and Benton counties. WSDA adopted an emergency rule expanding the internal quarantine area and amending its terms effective April 28, 2026.
Review the WSDA Japanese beetle quarantine information before moving material from an affected area. Check the rule for the particular item rather than assuming that a plant intended as a gift, a pot of soil, or yard debris can leave the area. The relevant question is where the material comes from and what the rule allows.
Begin an identification question with clear photographs and a short observation record. Note where the insect was seen, whether it was on a plant, and what damage was present. Treat damage as context for identification rather than proof of a particular species. Photographs offer a way to discuss an observation without first moving a suspected invasive insect or its host material.
For a plant-clinic discussion, organize the insect photograph and the plant observations together so the question is clear. For suspected invasive species, use state agriculture information to guide reporting and any next steps. Before sharing plants or clearing garden debris from a quarantine area, review the movement restrictions. Careful observation and attention to plant origins are practical habits to include in everyday garden planning.