Hammerhead worms are not dangerous to household pets, Morgan-Olvera said. If a dog or cat eats one of the worms, they will likely get nauseous and throw it up, but there is no long-term threat.

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Recent rain has caused the hammerhead flatworm, an invasive species, to emerge from its underground home, experts said.

Morgan-Olvera told USA TODAY that they are not dangerous to household pets, and if a dog or cat eats one of the worms, they will likely get nauseous and throw it up, but there is no long-term threat.

Morgan-Olvera told USA TODAY that they are not dangerous to household pets, and if a dog or cat eats one of the worms, they will likely get nauseous and throw it up, but there is no long-term threat.

Hammerhead worms do not bite, but they do secrete a poisonous chemical for protection against predators. This chemical may cause skin irritation on humans who hold the worm, Morgan-Olvera said. Are ...

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Mindy Weisberger's new book details the crafty worms, fungi, and other parasites that have learned to mind-control their hosts.

Today's Bug of the Week raises the “ick” factor to a higher level. Looking like something out of a sci-fi movie, Vivivanne ...