Read the passage about stick
insects.

Stick insects are a tasty snack for birds and other animals. But these bugs have a tricky way to hide. They look like sticks! They also don't move much. This makes them hard to spot in the trees where they live.
Some stick insects also have colorful wings that help keep them safe. They keep their wings closed until other animals come near. Then, the stick insects show their wings in a bright flash. This scares the animals away and gives the stick insects time to hide.
Stick insects have another neat trick. A stick insect can get away even if a bird catches it by the leg. The stick insect just lets its leg fall off! Luckily, stick insects can grow back any legs they lose.
Why is it hard for birds to see stick insects?
Stick insects blend in with the trees.
Stick insects move too fast to be seen.
Birds can't see colors well.
ref_doc_title.
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