The study looked at how different types of walking sticks adapted to different plants can lead to them becoming reproductively isolated. By comparing different populations in various environments, researchers found that adapting to different plants can create barriers to reproduction. However, being close to each other geographically can limit this divergence, except for when it comes to preventing mating between different ecotypes. This means that where the walking sticks live can affect how close they are to becoming separate species. The study suggests that more research on different walking stick species is needed to fully understand how new species form.