Researchers from the Estonian University of Life Sciences have discovered a cockroach species new to the Baltic region

Scientists at the Estonian University of Life Sciences determined that the specimen brought in for identification represents a cockroach species previously unrecorded in the Baltic region. The species most likely arrived in the student dormitory with people coming from abroad, who unknowingly transported the insect in their luggage from warmer regions.

The discovery was made possible by the fact that the insect was found by a university researcher, who then brought it to experienced colleagues for identification. “The discovery of new species is sometimes the result of a combination of circumstances, as was the case this time. In any event, such findings depend on interest in and curiosity about the surrounding world—qualities that are certainly abundant at universities,” said Olavi Kurina, Professor of Entomological Systematics at the Estonian University of Life Sciences.

The species, new to Estonia, was identified based on both morphological characteristics and molecular data. The brown-banded cockroach is characterized by two brown bands visible across its wings. In males, the wings cover the entire abdomen, whereas in females the wings are somewhat shorter.

The brown-banded cockroach likely originated in Africa, but has since spread worldwide with human assistance. It is found throughout the tropics as well as in warmer temperate regions. In southern Europe, the species is widespread, while in northern Europe only a few observations have been recorded in southern Sweden and Finland. “For Estonia, the brown-banded cockroach is the fifth cockroach species. At this latitude, one can also encounter the German cockroach, the Oriental cockroach, and two species of wood cockroaches,” Kurina added.

In Estonia, the newcomer thrives in heated indoor environments and is capable of completing its full life cycle. Like the German cockroach and the Oriental cockroach, the brown-banded cockroach is associated with human habitation and cannot survive outdoors in Estonian conditions. Nevertheless, the species deserves attention, as it may spread various bacteria and parasitic worm eggs.

Residents of the dormitory have no cause for concern, as the newly discovered species—first detected at the end of last summer—has already been dealt with by a pest control company. “Regular pest control is standard practice in accommodation facilities; this is nothing new for us. We are simply very pleased that, before the treatment, we were able to contribute to science by documenting a new species,” said Roland Aik Kask, a board member of Torni Hostel.

The discovery of the brown-banded cockroach in Tartu was reported in a scientific articlelink opens in new page published in early March in the journal Check List, and voucher specimens have been preserved in the zoological collection of the Estonian University of Life Sciences.