WILD BIRD CORONAVIRUS INFECTIONS
Coronaviruses among birds are more common in aquatic species, namely anseriformes and charadriiformes. An analytical review of the prevalence of gamma, delta and betacoronaviruses among wild birds of various species and genera is given. Gammacoronaviruses are predominantly found in birds in the order Squadlike - Galloanserae. Deltacoronaviruses, which have the smallest of the coronaviruses known in birds, have a distant kinship with IBV and are found mainly in the Neoaves order. The evolutionary dynamics of avian coronaviruses is characterized by the continuous emergence of new variants. Relevant publications are given in the USA, Brazil, England, Finland, Sweden, Poland, Korea, Hong Kong, and Cambodia. The practical absence of domestic works on this topic is noted. The factors determining the high epidemic and epizootic (primarily for poultry and pig breeding) potentials of avian coronaviruses are listed. The genetic relationship between coronaviruses of birds and mammals and, accordingly, a high probability of interspecific transition of coronaviruses among representatives of these classes are shown. The contradictions between the popular taxonomic classifications of coronaviruses are demonstrated. The contradictions between the popular taxonomic classifications of coronaviruses of the International Committee on Taxonomy of Viruses, the Information resource “Virus Pathogen Database and analysis Resource”, the National Center for Biotechnological Information of the USA and The Springer Index of Viruses. In their own way, bird gammacoronaviruses Fehr A., Perlman S. (2015) are classified. It is emphasized that the International Committee on the Taxonomy of Viruses is the only body that officially oversees the issues of taxonomy of viruses at the international level.