GBIF vs ERMs
Remarkably many disagreements exist between GBIF and ERM data, with 4/5 taxa having ~1/3 or more of their GBIF point data beyond their corresponding species distribution maps (Table 3a). This obscures differing regional trends, with the Palearctic, Neotropical and Indomalaysian regions containing >50% of records outside ERMs on average and the Australasian and Afrotropical regions having between 40-50% of localities outside their mapped ranges (Table 3b), and others with lower proportions. For species occurring in more than one realm, the number of realms a species is listed in may relate to error, with wider-ranging species showing a higher percentage of localities outside their mapped realms, and reptiles almost uniformly have the lowest accuracy.