name_usage(key, data = "iucnRedListCategory") returns Error for some keys instead of an empty tibble

[olehprylutskyi]

name_usage(key, data = "iucnRedListCategory") returns

Error: Status: 204 - not found

for some keys instead of an empty tibble, in contrast to how name_usage() behaves, for instance, with “synonyms” or "children" data parameter. This aborts any loops once Error is encountered and prevents looking up for IUCN RL category for a vector of taxonKeys.

Example:
name_usage(key = 7190896, data = "iucnRedListCategory")$data

Error: Status: 204 - not found

Compare with
name_usage(key = 7190896, data = "children")$data

A tibble: 0 × 0

[jhnwllr]

This seems to have more to do with how the GBIF API works rather than with rgbif. There isn't really an easy fix, and I think I would rather push for the GBIF API to return no results rather than a 204 warning.

https://api.gbif.org/v1/species/7190896/iucnRedListCategory

In the mean time you can wrap name_usage calls in a try statement to avoid getting the error.

gbif/gbif-api#108