The taxonomy of this dictionary (family, genus and species status and names) largely follows the IOC World Bird List (International Ornithological Congress), version 9.1 of January 2019.
Species vs. subspecies
Bird names are species names in principle. Subspecies considered as full species by some authorities or authors but as subspecies by others are also included as species, for example Motacilla flavissima. The variable status of such taxa is presented in the ‘extra info’ line, where it is mentioned for example as ‘May be subspecies: Motacilla flava flavissima’.
The scientific genus name used as an entry is the one used in IOC World Bird List 8.2. Where an alternative name is sometimes used, for example in Handbook of the Birds of the World Alive, Clements Checklist 2017, or Sibley and Monroe 1990, or was used in the past, this alternative is given below the preferred scientific (Latin) name. As an example, for Thalassarche cauta, the ‘Synonym Latin’ box gives ‘Diomedea cauta’. In exceptional cases, two or even three (e.g. Linaria flavirostris) alternative genus names are used. All reasonably well-known, including recent, alternative genus names can also be searched for.
The family name is given as the scientific (Latin) name only (ending in –idae). The family distribution of the IOC World Bird List is followed. Alternative (previous) family names are given in the ‘extra info’ box. The families according to the IOC are presented in the multilingual Species Lists.