With its pale bluish-gray to translucent wings highlighted by dark veins and margins, the Gray Glassy Tiger (Ideopsis juventa) is a medium-sized butterfly that lives up to its name. Its delicate, glassy appearance makes it one of the more distinctive butterflies found in the forests of Mount Makiling.
A Slow and Steady Flyer
The Gray Glassy Tiger is known for its characteristic slow, floating flight pattern. This leisurely flight style is typical of chemically protected Danaid butterflies, which don’t need to rely heavily on speed or camouflage to avoid predators. Both the larvae and adult butterflies are unpalatable to predators thanks to toxic compounds they acquire from their larval host plants in the family Apocynaceae.
Where to Find Them
The Gray Glassy Tiger is found across Southeast Asia, including several major islands in the Philippines such as Luzon. In areas like the Mount Makiling Forest Reserve, these butterflies inhabit lowland to mid-elevation forests, forest edges, and secondary growth areas. They are often observed along trails, near streams, and in sunlit clearings where flowering plants are abundant.
Conservation Concerns
Like many forest-dwelling species, the Gray Glassy Tiger faces threats from deforestation and habitat loss. Protecting the forested landscapes that support both their larval host plants and adult nectar sources is crucial for the survival of this species.
Partner With Us
Partner with us in our efforts to protect and conserve the Mariang Makiling Forest Reserve. Contact us at mcme.uplb@up.edu.ph to learn more.