Yes, you can keep woolly bear caterpillar friends at your home with very little effort. They are one of the easiest caterpillars you can raise as a pet. They don't bite you, they don't sting you, and they eat weeds from your yard. NC State Extension says woolly bears are simple to rear using plantain leaves. Your whole family can enjoy watching one grow into a moth over the coming months.
Setting up your woolly bear caterpillar terrarium takes about ten minutes with stuff you have at your home. I use a clear plastic tub or a big glass jar with mesh over the top for your airflow. Lay a damp paper towel flat on the bottom of your container. Add two or three small sticks for your caterpillar to climb on each day. Drop in a few fresh dandelion or plantain leaves from your yard and your little habitat is ready to go.
Your daily care routine won't take you much time at all. Swap out old leaves for fresh ones every day or every other day from your yard. Mist the inside of your container with a light spray of water to keep moisture up for your pet. Clean out any droppings from your container every few days. They look like small dark pellets you can spot with ease. Your caterpillar will eat, crawl around, and explore its small world without much fuss from you.
Here is where raising woolly bear caterpillar pets gets tricky for you. Your caterpillar needs a cold winter period to finish its life cycle at your home. Without it, your woolly bear won't spin a cocoon in spring and the whole process stalls on you. You can't just keep yours on your kitchen counter all winter long and expect a moth to show up. The cold triggers changes inside your caterpillar that get it ready for the big change ahead.
When your woolly bear stops eating and curls up in late fall, that's your signal to act. Move your container to your unheated garage, shed, or covered porch for the winter months. Some people use a fridge set between 35-40°F (2-4°C) if you don't have a cold space at your home. Keep your paper towel a bit damp and check on your pet once a week or so. Don't handle your caterpillar during this phase since it's fragile while it sleeps through your winter.
Your Container Setup
- Container type: Use a clear plastic tub or glass jar with a mesh lid for your caterpillar, at least 6 inches tall to give it room to climb.
- Your substrate: A damp paper towel on the bottom works better than soil for you since it's easy to clean and swap out every few days.
- Add climbing spots: Put two or three small twigs and a bit of bark in your container for your caterpillar to climb on each day.
Your Daily Feeding Routine
- Your food sources: Fresh dandelion or plantain leaves from your pesticide-free yard give your woolly bear all the nutrition it needs to stay healthy.
- Moisture for yours: Mist your leaves and container walls with water every day or two since your caterpillar drinks droplets from leaf surfaces.
- Your cleaning schedule: Remove old leaves and droppings every two to three days to stop mold from growing inside your caterpillar's home.
Your Winter Dormancy Care
- Your timing: Move your container to a cold spot once your caterpillar stops eating and curls up in late October or November at your home.
- Your temperature: Keep yours between 35-40°F (2-4°C) in your unheated garage or fridge for the winter months ahead.
- Your spring wake-up: Bring your container back to room temperature in early April and offer fresh leaves as soon as your caterpillar starts moving.
Once your spring arrives and your caterpillar wakes up, it will eat for a short time. Then it spins a cocoon from silk and its own body hairs right in your container. Two weeks later, your very own Isabella tiger moth comes out. Release your moth outdoors at dusk so it can find a mate. Your full journey from fall pickup to spring release takes about six to seven months. It makes a perfect nature project for your family.
Read the full article: Woolly Bear Caterpillar Facts and Guide
