Monarch eggs, caterpillars, chrysalises, and adult butterflies are eaten by many different predators. Included are spiders, wasps, some bird species, and many more predators.
Parasitoids such as...
A monarch butterfly has orange and black on it. these are warning colors in nature. a monarch is also poisonous form the poisonous things in the milkweed plant it eats as a caterpillar.
Monarchs consume nectar from various plants. Monarchs are toxic to eat but they are sometimes consumed by birds. Monarch eggs are sometimes eaten by the Asian lady beetle.