In the study of the biological sciences, biocommunication is any specific type of communication within (intraspecific) or between (interspecific) species of plants, animals, fungi, protozoa and microorganisms. Communication basically means sign-mediated interactions following three levels of (syntactic, pragmatic and semantic) rules. Signs in most cases are chemical molecules (semiochemicals), but also tactile, or as in animals also visual and auditive. Biocommunication of animals may include vocalizations (as between competing bird species), or pheromone production (as between various species of insects), chemical signals between plants and animals (as in tannin production used by vascular plants to warn away insects), and chemically mediated communication between plants and within plants. Biocommunication of fungi demonstrates that mycelia communication integrates interspecific sign-mediated interactions between fungal organisms soil bacteria and plant root cells without which plant nutrition could not be organized. Biocommunication of Ciliates identifies the various levels and motifs of communication in these unicellular eukaryotes. Biocommunication of Archaea represents keylevels of sign-mediated interactions in the evolutionarily oldest akaryotes. Biocommunication of Phages demonstrates that the most abundant living agents on this planet coordinate and organize by sign-mediated interactions. Biocommunication is the essential tool to coordinate behavior of various cell types of immune systems. Biocommunication, biosemiotics and linguistics Biocommunication theory may be considered to be a branch of biosemiotics. Whereas Biosemiotics studies the production and interpretation of signs and codes, biocommunication theory investigates concrete interactions mediated by signs. Accordingly, syntactic, semantic, and pragmatic aspects of biocommunication processes are distinguished. Biocommunication specific to animals (animal communication) is considered a branch of zoosemiotics. The semiotic study of molecular genetics, can be considered a study of biocommunication at its most basic level. Interpretation of abiotic indices Interpreting stimuli from an organism's environment is an essential part of life for any individual. Abiotic things that an organism must interpret include climate (weather, temperature, rainfall), geology (rocks, soil type), and geography (location of vegetation communities, exposure to elements, location of food and water sources relative to shelter sites). Birds, for example, migrate using cues such as the approaching weather or seasonal day length cues. Birds also migrate from areas of low or decreasing resources to areas of high or increasing resources. The two primary resources are usually sought to be food or nesting locations. Birds that nest in the Northern Hemisphere tend to migrate north in the spring season due to the increase in insect population, budding plants and the abundance of