Choose the sentence that shows what scientists believe may relate to the increase of white monarch butterflies on Oahu.
1. They learned that monarch butterflies make a tasty snack for bulbul birds.
2. These birds don’t seem to mind the milkweed toxins stored in the monarch’s flesh.
3. Judging from the carnage they leave behind—disembodied butterfly wings, mostly orange, scattered like autumn leaves on the ground.
4. Bulbuls are most likely to target orange monarchs.