Expressive language disorder is characterized by a child having difficulty expressing him- or herself using speech. The signs and symptoms vary drastically from child to child. The child does not have problems with the pronunciation of words, as occurs in phonological disorder .
You can usually determine the type of rodent by the size of the feces. Mice feces will be no larger than a grain of rice. If you are looking at pellet-sized stool, chances are you have a rat or a squirrel on your hands. The difference between squirrel and rat poop can have a lot to do with shape and color. Because of their limited diets, squirrel droppings are usually lighter in color and have a wrinkled appearance. Rats will eat almost anything, and their fecal matter is often dark and oblong in shape. Depending on the species of rat, the droppings ends may be rounded or pointed.
The most common rats in the USA are Norway Rats and Roof Rats. A quick look at the habits of both will help you understand how to inspect and control the rat population. Norway rats are larger than the smaller, and sleeker Roof Rats. Roof rats have bigger ears and a longer tail than the Norway rat. Also, the roof rat has a pointed nose, and they are excellent climbers. Roof Rats inhabit attics, upper stories, and exterior vegetation. Norway rats occupy lower portions of the building and the ground.