This is probably the best-known butterfly in New Zealand, originally from North America and first recorded here in the mid-1800s. It is considered a native because it flew/blew to NZ.
Native ( flew/blew from N. America)
Milkweed, e.g. swan plant (Gomphocarpus fruticosus), giant swan plant (G. physocarpus), and tropical milkweed (Asclepias curassavica)
Creamy and ridged, usually on underside of new growth.Takes about five days to hatch.
Yellow/black/white stripes, five instars. Average of 14 days before pupation.
Bright green. About ten days, depending on temperature/season, before it ecloses.
Orange, black and white. Male has two scent glands on hindwings, and thinner veins than female.
About 100 mm.
As adults in conifer trees.
Naturally as far south as 45 degrees.