This is a picture of an anise swallowtail female that was raised from a caterpillar. If you want to look for anise swallowtail eggs or caterpillars, it's important to look right after their main flight. Along the California coast, anise swallowtails fly from early spring to fall. In the Rocky Mountains, anise swallowtails generally in Mayat elevations around 5000 feet; June at elevations around 6-7,000 feet; and July at 8-9,000 feet.