Adult Green Lacewings are small to medium-sized insects (10-20 mm). They are bright green, with soft skinny bodies and large wings that fold over their back like roof on a house. They often have golden eyes. The larvae are also long, with an large sharp mandibles, bumpy skin, and and long strips of brown or grey on a lighter background. Often it's tail lashes and moves as it hunts.
Green Lacewings are found around the world. There are about 90 species in the United States, and probably about 30 species in Michigan.
These predators are found in vegetation, especially forest and grassland.
Active larvae emerge from eggs and start to hunt. This group has complete metamorphosis, so after the larva has grown and molted several times, it spins a cocoon under a leaf and pupates, emerging as a winged adult later.
Probably about one year.
Larvae are active during the day and night, adults only move around or fly at night. These animals are not social.
Probably mainly by scent and hearing, perhaps also visually. Males and females sing "duets", calling back and forth to each other during courtship.
Some green lacewings can hear the calls of bats, and when they do they drop out of the air and land immediately. They are active at night to avoid the attention of birds. The larvae appear to have a chemical defense, but little is known of this.
Lacewings are important for the control of aphids and other small pest insects on plants. Species in this group are sold to gardeners and farmers for release onto their plants.
No species (that we know of) are endangered.
George Hammond (author), Animal Diversity Web.