Screwworms are a type of small, white insect that can hurt animals by eating their flesh.
Screwworms are very bad for animals and can make them very sick or even kill them.
Examples:
The vet has to remove the screwworms from the cow's wound.
Screwworms are a big problem for farmers.
The screwworms are hurting the dog.
The screwworms are like tiny vampires, sucking the blood from the animals.
The screwworms are so mean, they make the animals cry.
The screwworms are like tiny monsters, eating the animals from the inside.