Which key characteristic does NOT apply to bat guano compared to rodent droppings?

The key characteristic that does not apply to bat guano compared to rodent droppings is the presence of white chalky material. Bat guano is primarily made up of digested insect exoskeletons and has a dark, rich color, often appearing more like a paste than a dry substance. This composition lacks the white, chalky residue that can sometimes be found in rodent droppings, which may contain undigested materials like seeds or grains.

In contrast, rodent droppings typically have a segmented appearance, are elongated in shape, and can be characterized by a friable or crumbly texture due to the nature of their diet. Understanding these differences is crucial for wildlife management and controlling pest populations, as it aids in species identification and informs appropriate actions for trapping or exclusion.