In what type of location are voles considered problematic?

Voles are small rodents that thrive in specific environments, and they are particularly problematic in areas with dense, low-growing vegetation near tree trunks. This type of habitat provides them with ample cover, food sources, and protection from predators. The low vegetation allows voles to build extensive tunnel systems, which can lead to significant damage to tree roots and young plants, ultimately affecting forest health and plant growth.

In contrast, open grasslands may provide some habitat for voles, but the lack of dense cover limits their proliferation and hiding spots. High-altitude forests are typically less conducive to vole activity due to harsher environmental conditions and limited vegetation suitable for nesting and feeding. Agricultural fields can be problematic for voles as well, since they can damage crops. However, the specific reference to the dense, low-growing vegetation near tree trunks highlights the particular challenges posed by voles in those locations, making it the most accurate response.