I’m often asked by data users what the best way is to get and cite data for multiple taxa. We’ve always recommended that people include as many taxa as possible in a their searches to limit the number of downloads and thus DOIs requiring citation. Unfortunately, due to technical limits this has not always been feasible—especially for users requiring data for hundreds or thousand of species.
I’m happy to report that we’ve recently been able to significantly ease the restrictions on number of taxa per query. As there are several systems in place that impose bottlenecks, including the user’s own browser, it’s difficult to give an exact number. But we’ve logged successful downloads of more than
3,500 9,000 concurrent species, which should be enough for the majority of users.
For multiple-taxa downloads, keep in that you can reduce complexity significantly by requesting data at at higher taxon level—and then filtering data locally.
We will continue to explore ways of making downloading data easier, including removing limits on number of taxa. In the meantime, should you run into query limits, please get in touch with email@example.com and they might be able to help.