Among the species that have experienced a complex relationship with humans, Norway rats, house mice, and German cockroaches are often cited as prominent examples. These creatures have adapted to human environments and flourished alongside human populations. In particular, they have become pests in urban areas and pose challenges for pest control efforts.

On the other hand, certain animals like house sparrows showcase a different pattern. While they have thrived as an invasive species in countries where they were introduced, they have faced declines in their native habitats. This situation highlights the delicate balance between the success of certain species in human-altered environments and the negative consequences it can have on their original ecosystems.

It is a reminder that human actions can have far-reaching impacts on the natural world, and it underscores the importance of understanding and managing these dynamics to preserve biodiversity and maintain ecological equilibrium.