Brown or black droppings resembling instant rice grains in size and shape and composed entirely of insect parts are produced by____________________.

Brown or black droppings that resemble instant rice grains in size and shape and are composed entirely of insect parts are characteristic of bat guano. This type of droppings can often be identified by their distinct appearance and the fact that they are primarily made up of insect exoskeletons and other remains. Bats consume a diet that mainly includes insects, and their droppings reflect this by being primarily composed of insect body parts.

In contrast, rat and mouse droppings tend to be more rod-shaped and have different characteristics, reflecting their dietary habits and physiology. Termite droppings, known as frass, also differ, as they generally have a more pelletized appearance, and while they can contain wood particles, they are not composed solely of insect parts in the same way that bat guano is. Understanding these distinctions is crucial for accurate identification in pest control practices.