Is caster bean plant poisonous to chipmunks?

Yes, the caster bean plant (Ricinus communis) is toxic to many animals, including chipmunks. It contains ricin, a highly toxic compound that can cause severe illness or death if ingested. While chipmunks may not commonly consume the plant, exposure to its parts can pose a risk to their health. It's always best to keep pets and wildlife away from potentially toxic plants.