Although the existence of an overall dominance hierarchy in dogs is debated [23], and the Vizsla is a «peaceful» breed, which, compared to other breeds, rarely fights with conspecifics [34], we detected a dominance hierarchy via a questionnaire assessing agonistic and affiliative situations [29]. (journals.plos.org)
A variety of phenotypic characteristics observed in freshwater fish species are recognized as important factors in eliciting social interactions between conspecifics [18], [47]--[50]. (journals.plos.org)
Chameleons are known to communicate with conspecifics by altering their surface coloration. (sciencedaily.com)