Different authorities may use different English and scientific names for the same species, which makes searching for information a little difficult! Even the most recognized authorities do not agree on all species and subspecies.
I have decided to base my work on the names defined by IOC World Bird List (rev. 8.1) [IOC].
I also use the following sources in my work:
Whenever there is dispute about classification or the official English name, I will mention it in the articles.
The index with English names also list any known synonym to make it easier to find a specific species.