Microplastics are small plastic particles that can be found in the environment. They can come from a variety of sources, such as plastic bags, straws, and fishing nets. Microplastics can also be formed when larger pieces of plastic break down over time.

Microplastics are a concern because they can be harmful to wildlife. They can be ingested by animals, and can cause blockages in the digestive tract. Microplastics can also absorb toxic chemicals from the environment, and can then pass these chemicals up the food chain.

In a new study, scientists have developed a new technique that can show the link between prey and microplastics. The technique uses a fluorescent dye to tag microplastics. When an animal ingests microplastics, the dye can be detected in the animal's feces.

The new technique could be used to study the effects of microplastics on wildlife. It could also be used to track the movement of microplastics through the environment.

The study was published in the journal Environmental Science & Technology.