Some years, it's a great host for pipevine swallowtail caterpillars; in other years, we don't see any. This has been a good year for early sighting of butterflies and caterpillars, maybe because of unseasonably warm temperatures early in spring.
|Pipevine Swallowtail caterpillar|
I hadn't noticed so many in previous years.
|Chrysalises and (probably 4th) instar|