Avibase - The World Bird Database

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MyAvibase allows you to create and manage your own lifelists, and produce useful reports to help you plan your next birding excursion.
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Checklists

There are more than 20,000 regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than 175 languages. Each checklist can be viewed with photos shared by the birding community, and also printed as PDF checklists for field use.
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Bird checklist historical comparisons

You can use this page to compare any 2 historical versions of a published checklist. For example, you can use this tool to see what changes have occurred between the 6th and the 7th edition of the AOU checklist, or between the 48th and the 49th supplement. Note that cross-checklists comparisons are only available for global checklists. You also restrict the list of changes to a geographic region (e.g. a country, a province or a site) to see only changes affecting birds in a specific area.

Checklist #1

Select a checklist:

Version:

Checklist #2

Select a checklist:

Version

Show only changes affecting this continent:

then select a region:

countries only include provinces/states show all checklists

Scientific name	Common name	Alternate name	Family name	Scientific name	Common name	Alternate name	Family name	View

Legend
	Taxon removed. This color indicates that the taxonomic concept is only present in the first checklist. The species was either removed entirely from the list, or may have been replaced by another taxon concept (eg, following a species split or a species lump).
	Taxon added. This color indicates that the taxonomic concept is only present in the second checklist. The species was either entirely new to the checklist, or it may replace another concept (eg, following a species split or a species lump).
	Name changed. This color indicates that the taxonomic concept is the same between the 2 versions (ie, that the names refers to the same population), but that the scientific, common or family name has been modified.