There are more than 10,000 regional checklists in Avibase, offered in 9 different taxonomies, including synonyms in dozens of languages. Each checklist can be viewed with photos shared by the birding community, and also printed as PDF checklists for field use.
The Escudo Hummingbird (Amazilia tzacatl handleyi) is a hummingbird in the subfamily Trochilinae. It was long considered a doubtfully distinct species, but more recently it is generally treated as a subspecies of the Rufous-tailed Hummingbird, A. tzacatl. Source: Wikipedia