Prior research has shown that monarch caterpillars have developed a way to eat milkweed leaves despite their rich load of toxin-rich latex. They bite a vein and then wait for the milky substance ...

The skin splits open and the caterpillar wiggles out, revealing new skin beneath. Over the next two weeks, it molts four times and becomes nearly 3 inches long. Monarch caterpillars have ...

Monarch caterpillars only eat milkweed. The borough is working with the Audubon Society of Western Pennsylvania, which has identified an invasive species called canary grass in the Mel Lubert ...