How does the complexity of a woodrat's midden compare to the simple bedding of a species like the house mouse?

The midden is a substantially complex, multi-purpose structure contrasting sharply with quick, simple bedding.

The construction quality of a woodrat's midden represents a significant investment in long-term infrastructure when compared to the rudimentary bedding of some other small rodents, such as the house mouse. A house mouse typically creates quick, simple bedding for temporary shelter. In contrast, the woodrat constructs an intricate, multi-purpose midden that functions as robust shelter, a food pantry, and a nursery. This complexity involves careful layering for insulation and security, demonstrating a greater emphasis on long-term site fidelity and resource accumulation than quick nest construction.