|Monarchs are the most famous example.|
|But Queens also depend on milkweed.|
|That dependence is related to the production of the next generations. Their caterpillars have to have milkweed to develop. Here is a Monarch cat.|
|And here's the Queen caterpillar.|
There is another insect, though, that is so tied to milkweed that it even has the plant in its name. It is the milkweed bug (Oncopeltus fasciatus).