Attention insect lovers: Asian beetles are conquering nature!

Attention insect lovers: Asian beetles are conquering nature!

Some fascinating relationships between animals and plants can be observed in Dutch nature. Particular attention is paid to the Boletenzwartlijfje, a small beetle that lives in symbiosis with various types of fungi. Information from Omroep Brabant report a discovery in which the beetles were found in the vicinity of mushrooms - particularly schwevel and birch mushrooms. These beetles have black-orange colorings and reach a maximum size of just 8 mm. Their entire way of life takes place on the mushrooms: adult beetles eat the fungus while their larvae burrow through the pulp.

The interesting symbiosis is confirmed by Hélène Felix's findings near Tilburg, where she discovered the beetles in a type of sponge.

Aziatic Lieveheersbeestje: An invasive newcomer

Another notable insect that has become more important in the Netherlands in recent years is the Asian lieveheersbeestje (Harmonia axyridis). This insect was originally native to Japan and China and was brought to Europe in 1996 to be used in greenhouses to combat aphids. This species was first observed in the wild in the Netherlands in 2002, although experts initially assumed that it would not survive the winter Kerfdier noted.

Interestingly, the Asian Lieveheersbeestje has since spread widely and is now one of the most common species in gardens. However, it is not a native beetle and could potentially pose a threat to native species. This aggressive species is larger than native beetles and can eat about 65 aphids per day, making it an effective but potentially harmful insect.

The importance of interactions in ecosystems

The Asian Lieveheersbeestje's eating behavior includes not only eating aphids, but also cannibalism, as the beetle larvae eat other larvae. These practices could have long-term effects on the composition of insect populations in the Netherlands and are a clear sign of the ongoing invasion of this species.

In addition to studying these beetle species, the occurrence of other insects is also of interest. A nature lover noticed a black and yellow mosquito that was identified as a Driebandtijger, and inquiries about bromine flies (Pollenia spec.) were also answered. As part of this natural history exchange, it becomes clear how important it is to observe and understand the interactions between different species and their habitats.

Finally, Rinus Mesman reported the sighting of a young vink whose appearance is typical of the females, apart from the striking colors and patterns of the males. Such observations enrich knowledge of wildlife and embody the diversity of life in Dutch gardens.