Murder hornet nest discovered for 1st time in US

These massive hornets can be up to five times larger than a honeybee.
2:03 | 10/24/20

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Transcript for Murder hornet nest discovered for 1st time in US
And the latest on an overseas invasion, so-called murder hornets and the push to find them before they enter their aggressive slaughter phase and attack native honeybees. Stephanie Ramos has more on a breakthrough. Reporter: The first ever Asian giant hornet nest discovered in the U.S. These massive hornets can be up to five times larger than a honeybee. The so-called murder hornets found in Washington state nestled inside a tree. Trapping some of the insects and using dental floss to tie tracking devices to their bodies. I took a step back and realized we were actually standing right under the nest. We had in fact tracked her straight back to where she came from. Reporter: The discovery comes after weeks of trapping and searching. Researchers caught a murder hornet for the first time in the United States earlier this year. The hornets native to Asia living up to its lethal name killing up to 50 people in Japan each year. Now residents in the area fearful about the hornet's nest. The ability of that thing to be able to sting people and sting livestock and things like that is a big concern. Reporter: In the U.S. Experts say these hornets attack honeybee hives. Able to kill thousands in hours. That raising concern with a possible invasion threatening other insects that help keep plants and crop alive through pollination. Honeybees are incredibly important to our food security. These organisms can decimate honeybee colonies. Reporter: Washington state entomologists plan to destroy the nest over the weekend in an effort to eliminate the giant insect so they don't spread along the west coast. They say there may be more out there but at least now they know. They're able to track them down. Whit? Stephanie Ramos for us, thank you. I'm still trying to figure out how they tie a tracking device to -- and who has to hold it to do that. I'm just trying to figure out how 2020 can get worse. Good point.

This transcript has been automatically generated and may not be 100% accurate.

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