There is a lot of information on the internet about different species that are extinct or possibly extinct, but very little that has been built with concrete sources. In this module, we provide access to the records of some species, which include their history, geolocations of their historical records on the map, a summary of concrete records, and cited bibliography. Each paragraph has the citation of the bibliography used, and in most cases, each bibliography has access to the original source for verification. These records attempt to provide information that is difficult to find or gather on the internet and are bibliographic compilations from reliable sources.

We must know about extinct species, recognize the reasons for their disappearance, to learn how to protect those that are currently endangered. Sometimes, species that were believed to be extinct are re-recorded, so we hope that more and more people will be prepared to identify these species in the field, even if they are no longer present in some field guides, such as the Eskimo Curlew (Numenius borealis), since a discovery of these species would be of critical importance in generating protection plans.