Distribution & Habitat: Widly distributed across much of coastal Australia
Items of Interest: Last sighting in 2019: 08/05; in 2020 30/04
Distribution of its five known Apocynaceae food plants:- Cynanchum carnosm is a plant of salt marshes in NSW. We have found it growing beside the boardwalk in Urunga and near the river mouth in North Haven (just south of Port Macquarie). Cynanchum leptolepis endemic to Australia, found in NT, CYP, FNQ & CeQ. Ranges from close to sea level up to 400 m. Grows in open forest and vine thickets Marsdenia velutina found in WA, NT, CYP, FNQ. Ranges from close to sea level up to 250 m. Grows in open forest, vine thickets and rainforest. Heterostemma acuminata is only found in tropical rainforests Secamone elliptica grows in Northern New South Wales and Queensland and is said not to be found south of Iluka.
MIGRATION: Blue Tigers are only seen on the Dorrigo Plateau when migrating, their numbers fluctuate each year. In January & February, 2004, we recorded as many as ten or more on some days. However most years if present they only occur in much smaller numbers. The Blue Tiger appears more common on the Coffs coast than it is up here on the nearby Plateau.
Like so many of Australia's butterflies the Blue Tiger is considered less common today than in the past due to changes in land management in its coastal breeding grounds. Changes that often include the destruction of salt water marshes where one of its its foodplant's is found.