have you ever heard fish talking? Have you ever seen monkeys speaking to each other? well,perhaps not, but these creatures are able to communicate. They do 'talk' to others of their own kind; it's just that they don't use words and sentences like we do.
animals give and receive information in different ways. One way common among many land creatures is the use of scent,or odour ,and the sense of smell to detect it. Each species of such animals has its own odour and use it to communicate; for example, individuals may use their odour to let others know where they are and whether they are ready to mate. Some female butterflies, for instance, give out an odour that the males of their species can smell more than 3 kilometres away
some other animals use sound and the ability to hear. birds, as we know, make a wide variety of sounds - form cheeps and chirps to hoots and caws - all understandable by their own kind.