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.