Looks like Monarch.
My experience with the Monarch caterpillar was very short. I admired and photographed the caterpillar. Soon after a bird swooped down and said, "Thanks for the snack!" So if you want to watch the life cycle as it progresses, my advice would be to either provide a 'habitat' inside the house or create a protective enclosure to exclude birds and other predators. Here is a "Butterfly Pavillion" that can be purchased in a store for educators; it's about 24 inches tall.
