Insects are important for the survival of the ecosystem, but some beetles strongly push back native species. The Asian tiger mosquito is a vector of the Zika virus and the dengue virus.
The sponge moth is originally native to North Africa, but is now widespread in southern areas of Europe. The marmorated stink bug is a problem especially for agriculture, because it prefers to suck on fruits, which then spoil. The samurai wasp, which already lives in Germany, is considered the most successful natural enemy of the bugs.