Evergreen bagworm in forested areas are rare. With scarce predators in urban areas, evergreen bagworms often thrive in urban habitats. When disturbed, the larva will retract its head into its case and hold the front opening closed. Mature larva may remain in the host tree or drag its case nearby before attaching itself for the pupa stage. Arborvitae and red cedar are the favored host trees of the evergreen bagworm, but cypress, juniper, pine, spruce, apple, birch, black locust, elm, maple, poplar, oak, sycamore, willow, and over 100 other species are also attacked. Leaves and buds are both fair game for food.
Syzygium cordatum vối or vối rừng (Vietnamese). "Water berry" is also used for other species of "Syzygium". Occurs along streambanks from Kwazulu-Natal northwards to Zimbabwe and Mozambique. It grows in forest margins, in bush or open grassy and sometimes high country. This tree is known for its many uses. The fleshy fruit is slightly acidic in flavour and is eaten by children, monkeys, bush-babies, bats and birds. The berries are also used to sometimes make an alcoholic drink. The powdered bark is used as a fish poison. In central Africa the tree is known as a remedy for stomach ache and diarrhoea.