Ropalidia revolutionalis

They are known for the distinctive combs they make for their nests, and they have been found in Queensland, Australia in the areas of Brisbane and Townsville.

[6] R. revolutionalis are small, dark, reddish brown wasps with body lengths of 8 to 10 mm.

[3] The nests of R. revolutionalis consist of several combs each about 100 mm long with two columns of cells that resemble sticks hanging from a branch.

[1][unreliable source] Their nests are usually found on shrubs, hanging baskets, under eaves, or near other sheltered areas.

[3] Ropalidia revolutionalis is an independent-founding wasp species that begins building nests each spring.

These progeny then mate with wasps from other colonies, and then the females find secure locations in which they can reside during the winter.

[3] Also, occasionally females reconstruct old nests that partially deteriorated during the winter, which suggests that some colonies last more than one year.

Females rear the young into August even as the nest deteriorates, and the larvae eventually pupate and become adult wasps.

[1][unreliable source] When temperatures are high, workers will often raise their abdomens, draw their legs in, and fan their wings rapidly in an effort to cool down the nest.

[10] These females occasionally engage in aggressive acts such as darting around for short intervals [2] or climbing onto the backs of subordinates and chewing or biting.

Also, there is usually one primary dominant reproducer,[2] and that producer stays in the nest and sits on capped cells containing pupae.

[8] If a member of either sex of R. revolutionalis feels threatened, the wasp assumes a defensive position on the nest.

It will warn the intruder to retreat by first lifting and spreading its wings, and then waving its front legs and sometimes shaking its body.

[11] Ropalidia revolutionalis help control pests in gardens by catching caterpillars and other insects for their larvae.

Ropalidia revolutionalis inspecting a comb. (More combs shown in the background)